Linear Algebra Examples

$[\begin{array}{c} \frac{1}{\sqrt{17}} & - \frac{4}{\sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 1

Multiply $\frac{1}{\sqrt{17}}$ by $\frac{\sqrt{17}}{\sqrt{17}}$ .

$[\begin{array}{c} \frac{1}{\sqrt{17}} \cdot \frac{\sqrt{17}}{\sqrt{17}} & - \frac{4}{\sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 2

Combine and simplify the denominator.

Tap for more steps...

Step 2.1

Multiply $\frac{1}{\sqrt{17}}$ by $\frac{\sqrt{17}}{\sqrt{17}}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{\sqrt{17} \sqrt{17}} & - \frac{4}{\sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 2.2

Raise $\sqrt{17}$ to the power of $1$ .

$[\begin{array}{c} \frac{\sqrt{17}}{{\sqrt{17}}^{1} \sqrt{17}} & - \frac{4}{\sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 2.3

Raise $\sqrt{17}$ to the power of $1$ .

$[\begin{array}{c} \frac{\sqrt{17}}{{\sqrt{17}}^{1} {\sqrt{17}}^{1}} & - \frac{4}{\sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 2.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$[\begin{array}{c} \frac{\sqrt{17}}{{\sqrt{17}}^{1 + 1}} & - \frac{4}{\sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 2.5

Add $1$ and $1$ .

$[\begin{array}{c} \frac{\sqrt{17}}{{\sqrt{17}}^{2}} & - \frac{4}{\sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 2.6

Rewrite ${\sqrt{17}}^{2}$ as $17$ .

Tap for more steps...

Step 2.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{17}$ as $17^{\frac{1}{2}}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{{(17^{\frac{1}{2}})}^{2}} & - \frac{4}{\sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 2.6.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17^{\frac{1}{2} \cdot 2}} & - \frac{4}{\sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 2.6.3

Combine $\frac{1}{2}$ and $2$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17^{\frac{2}{2}}} & - \frac{4}{\sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 2.6.4

Cancel the common factor of $2$ .

Tap for more steps...

Step 2.6.4.1

Cancel the common factor.

$[\begin{array}{c} \frac{\sqrt{17}}{17^{\frac{2}{2}}} & - \frac{4}{\sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 2.6.4.2

Rewrite the expression.

$[\begin{array}{c} \frac{\sqrt{17}}{17^{1}} & - \frac{4}{\sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 2.6.5

Evaluate the exponent.

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4}{\sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 3

Multiply $\frac{4}{\sqrt{17}}$ by $\frac{\sqrt{17}}{\sqrt{17}}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - (\frac{4}{\sqrt{17}} \cdot \frac{\sqrt{17}}{\sqrt{17}}) \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 4

Combine and simplify the denominator.

Tap for more steps...

Step 4.1

Multiply $\frac{4}{\sqrt{17}}$ by $\frac{\sqrt{17}}{\sqrt{17}}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{\sqrt{17} \sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 4.2

Raise $\sqrt{17}$ to the power of $1$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{{\sqrt{17}}^{1} \sqrt{17}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 4.3

Raise $\sqrt{17}$ to the power of $1$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{{\sqrt{17}}^{1} {\sqrt{17}}^{1}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 4.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{{\sqrt{17}}^{1 + 1}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 4.5

Add $1$ and $1$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{{\sqrt{17}}^{2}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 4.6

Rewrite ${\sqrt{17}}^{2}$ as $17$ .

Tap for more steps...

Step 4.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{17}$ as $17^{\frac{1}{2}}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{{(17^{\frac{1}{2}})}^{2}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 4.6.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17^{\frac{1}{2} \cdot 2}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 4.6.3

Combine $\frac{1}{2}$ and $2$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17^{\frac{2}{2}}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 4.6.4

Cancel the common factor of $2$ .

Tap for more steps...

Step 4.6.4.1

Cancel the common factor.

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17^{\frac{2}{2}}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 4.6.4.2

Rewrite the expression.

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17^{1}} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 4.6.5

Evaluate the exponent.

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 5

Multiply $\frac{1}{\sqrt{17}}$ by $\frac{\sqrt{17}}{\sqrt{17}}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{1}{\sqrt{17}} \cdot \frac{\sqrt{17}}{\sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 6

Combine and simplify the denominator.

Tap for more steps...

Step 6.1

Multiply $\frac{1}{\sqrt{17}}$ by $\frac{\sqrt{17}}{\sqrt{17}}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{\sqrt{17} \sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 6.2

Raise $\sqrt{17}$ to the power of $1$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{{\sqrt{17}}^{1} \sqrt{17}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 6.3

Raise $\sqrt{17}$ to the power of $1$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{{\sqrt{17}}^{1} {\sqrt{17}}^{1}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 6.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{{\sqrt{17}}^{1 + 1}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 6.5

Add $1$ and $1$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{{\sqrt{17}}^{2}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 6.6

Rewrite ${\sqrt{17}}^{2}$ as $17$ .

Tap for more steps...

Step 6.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{17}$ as $17^{\frac{1}{2}}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{{(17^{\frac{1}{2}})}^{2}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 6.6.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17^{\frac{1}{2} \cdot 2}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 6.6.3

Combine $\frac{1}{2}$ and $2$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17^{\frac{2}{2}}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 6.6.4

Cancel the common factor of $2$ .

Tap for more steps...

Step 6.6.4.1

Cancel the common factor.

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17^{\frac{2}{2}}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 6.6.4.2

Rewrite the expression.

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17^{1}} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 6.6.5

Evaluate the exponent.

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17} \\ - \frac{4}{\sqrt{17}} \end{array}]$

Step 7

Multiply $\frac{4}{\sqrt{17}}$ by $\frac{\sqrt{17}}{\sqrt{17}}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17} \\ - (\frac{4}{\sqrt{17}} \cdot \frac{\sqrt{17}}{\sqrt{17}}) \end{array}]$

Step 8

Combine and simplify the denominator.

Tap for more steps...

Step 8.1

Multiply $\frac{4}{\sqrt{17}}$ by $\frac{\sqrt{17}}{\sqrt{17}}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17} \\ - \frac{4 \sqrt{17}}{\sqrt{17} \sqrt{17}} \end{array}]$

Step 8.2

Raise $\sqrt{17}$ to the power of $1$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17} \\ - \frac{4 \sqrt{17}}{{\sqrt{17}}^{1} \sqrt{17}} \end{array}]$

Step 8.3

Raise $\sqrt{17}$ to the power of $1$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17} \\ - \frac{4 \sqrt{17}}{{\sqrt{17}}^{1} {\sqrt{17}}^{1}} \end{array}]$

Step 8.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17} \\ - \frac{4 \sqrt{17}}{{\sqrt{17}}^{1 + 1}} \end{array}]$

Step 8.5

Add $1$ and $1$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17} \\ - \frac{4 \sqrt{17}}{{\sqrt{17}}^{2}} \end{array}]$

Step 8.6

Rewrite ${\sqrt{17}}^{2}$ as $17$ .

Tap for more steps...

Step 8.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{17}$ as $17^{\frac{1}{2}}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17} \\ - \frac{4 \sqrt{17}}{{(17^{\frac{1}{2}})}^{2}} \end{array}]$

Step 8.6.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17} \\ - \frac{4 \sqrt{17}}{17^{\frac{1}{2} \cdot 2}} \end{array}]$

Step 8.6.3

Combine $\frac{1}{2}$ and $2$ .

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17} \\ - \frac{4 \sqrt{17}}{17^{\frac{2}{2}}} \end{array}]$

Step 8.6.4

Cancel the common factor of $2$ .

Tap for more steps...

Step 8.6.4.1

Cancel the common factor.

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17} \\ - \frac{4 \sqrt{17}}{17^{\frac{2}{2}}} \end{array}]$

Step 8.6.4.2

Rewrite the expression.

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17} \\ - \frac{4 \sqrt{17}}{17^{1}} \end{array}]$

Step 8.6.5

Evaluate the exponent.

$[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17} \\ - \frac{4 \sqrt{17}}{17} \end{array}]$

Step 9

Multiply $[\begin{array}{c} \frac{\sqrt{17}}{17} & - \frac{4 \sqrt{17}}{17} \end{array}] [\begin{array}{c} \frac{\sqrt{17}}{17} \\ - \frac{4 \sqrt{17}}{17} \end{array}]$ .

Tap for more steps...

Step 9.1

Two matrices can be multiplied if and only if the number of columns in the first matrix is equal to the number of rows in the second matrix. In this case, the first matrix is $1 \times 2$ and the second matrix is $2 \times 1$ .

Step 9.2

Multiply each row in the first matrix by each column in the second matrix.

$[\begin{array}{c} \frac{\sqrt{17}}{17} \cdot \frac{\sqrt{17}}{17} - \frac{4 \sqrt{17}}{17} (- \frac{4 \sqrt{17}}{17}) \end{array}]$

Step 9.3

Simplify each element of the matrix by multiplying out all the expressions.

$[\begin{array}{c} 1 \end{array}]$