Algebra Examples

$[\begin{array}{c} 0 & 0 & - 1 & - 1 & - 6 & - 6 \\ 0 & 4 & 4 & 1 & 1 & 0 \end{array}]$

Step 1

Swap $R_{2}$ with $R_{1}$ to put a nonzero entry at $1, 2$ .

$[\begin{array}{c} 0 & 4 & 4 & 1 & 1 & 0 \\ 0 & 0 & - 1 & - 1 & - 6 & - 6 \end{array}]$

Step 2

Multiply each element of $R_{1}$ by $\frac{1}{4}$ to make the entry at $1, 2$ a $1$ .

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Step 2.1

Multiply each element of $R_{1}$ by $\frac{1}{4}$ to make the entry at $1, 2$ a $1$ .

$[\begin{array}{c} \frac{0}{4} & \frac{4}{4} & \frac{4}{4} & \frac{1}{4} & \frac{1}{4} & \frac{0}{4} \\ 0 & 0 & - 1 & - 1 & - 6 & - 6 \end{array}]$

Step 2.2

Simplify $R_{1}$ .

$[\begin{array}{c} 0 & 1 & 1 & \frac{1}{4} & \frac{1}{4} & 0 \\ 0 & 0 & - 1 & - 1 & - 6 & - 6 \end{array}]$

Step 3

Multiply each element of $R_{2}$ by $- 1$ to make the entry at $2, 3$ a $1$ .

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Step 3.1

Multiply each element of $R_{2}$ by $- 1$ to make the entry at $2, 3$ a $1$ .

$[\begin{array}{c} 0 & 1 & 1 & \frac{1}{4} & \frac{1}{4} & 0 \\ - 0 & - 0 & - - 1 & - - 1 & - - 6 & - - 6 \end{array}]$

Step 3.2

Simplify $R_{2}$ .

$[\begin{array}{c} 0 & 1 & 1 & \frac{1}{4} & \frac{1}{4} & 0 \\ 0 & 0 & 1 & 1 & 6 & 6 \end{array}]$

Step 4

Perform the row operation $R_{1} = R_{1} - R_{2}$ to make the entry at $1, 3$ a $0$ .

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Step 4.1

Perform the row operation $R_{1} = R_{1} - R_{2}$ to make the entry at $1, 3$ a $0$ .

$[\begin{array}{c} 0 - 0 & 1 - 0 & 1 - 1 & \frac{1}{4} - 1 & \frac{1}{4} - 6 & 0 - 6 \\ 0 & 0 & 1 & 1 & 6 & 6 \end{array}]$

Step 4.2

Simplify $R_{1}$ .

$[\begin{array}{c} 0 & 1 & 0 & - \frac{3}{4} & - \frac{23}{4} & - 6 \\ 0 & 0 & 1 & 1 & 6 & 6 \end{array}]$