Algebra Examples

$7 - 2 z - 4 (z^{3} - \frac{z^{3} + 4 z^{2} + 11 z + 14}{z + 2})$

Step 1

Simplify each term.

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Step 1.1

To write $z^{3}$ as a fraction with a common denominator, multiply by $\frac{z + 2}{z + 2}$ .

$7 - 2 z - 4 (\frac{z^{3} (z + 2)}{z + 2} - \frac{z^{3} + 4 z^{2} + 11 z + 14}{z + 2})$

Step 1.2

Combine the numerators over the common denominator.

$7 - 2 z - 4 \frac{z^{3} (z + 2) - (z^{3} + 4 z^{2} + 11 z + 14)}{z + 2}$

Step 1.3

Simplify the numerator.

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Step 1.3.1

Apply the distributive property.

$7 - 2 z - 4 \frac{z^{3} z + z^{3} \cdot 2 - (z^{3} + 4 z^{2} + 11 z + 14)}{z + 2}$

Step 1.3.2

Multiply $z^{3}$ by $z$ by adding the exponents.

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Step 1.3.2.1

Multiply $z^{3}$ by $z$ .

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Step 1.3.2.1.1

Raise $z$ to the power of $1$ .

$7 - 2 z - 4 \frac{z^{3} z^{1} + z^{3} \cdot 2 - (z^{3} + 4 z^{2} + 11 z + 14)}{z + 2}$

Step 1.3.2.1.2

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

$7 - 2 z - 4 \frac{z^{3 + 1} + z^{3} \cdot 2 - (z^{3} + 4 z^{2} + 11 z + 14)}{z + 2}$

Step 1.3.2.2

Add $3$ and $1$ .

$7 - 2 z - 4 \frac{z^{4} + z^{3} \cdot 2 - (z^{3} + 4 z^{2} + 11 z + 14)}{z + 2}$

Step 1.3.3

Move $2$ to the left of $z^{3}$ .

$7 - 2 z - 4 \frac{z^{4} + 2 \cdot z^{3} - (z^{3} + 4 z^{2} + 11 z + 14)}{z + 2}$

Step 1.3.4

Apply the distributive property.

$7 - 2 z - 4 \frac{z^{4} + 2 z^{3} - z^{3} - (4 z^{2}) - (11 z) - 1 \cdot 14}{z + 2}$

Step 1.3.5

Simplify.

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Step 1.3.5.1

Multiply $4$ by $- 1$ .

$7 - 2 z - 4 \frac{z^{4} + 2 z^{3} - z^{3} - 4 z^{2} - (11 z) - 1 \cdot 14}{z + 2}$

Step 1.3.5.2

Multiply $11$ by $- 1$ .

$7 - 2 z - 4 \frac{z^{4} + 2 z^{3} - z^{3} - 4 z^{2} - 11 z - 1 \cdot 14}{z + 2}$

Step 1.3.5.3

Multiply $- 1$ by $14$ .

$7 - 2 z - 4 \frac{z^{4} + 2 z^{3} - z^{3} - 4 z^{2} - 11 z - 14}{z + 2}$

Step 1.3.6

Subtract $z^{3}$ from $2 z^{3}$ .

$7 - 2 z - 4 \frac{z^{4} + z^{3} - 4 z^{2} - 11 z - 14}{z + 2}$

Step 1.4

Combine $- 4$ and $\frac{z^{4} + z^{3} - 4 z^{2} - 11 z - 14}{z + 2}$ .

$7 - 2 z + \frac{- 4 (z^{4} + z^{3} - 4 z^{2} - 11 z - 14)}{z + 2}$

Step 1.5

Move the negative in front of the fraction.

$7 - 2 z - \frac{4 (z^{4} + z^{3} - 4 z^{2} - 11 z - 14)}{z + 2}$

Step 2

To write $7$ as a fraction with a common denominator, multiply by $\frac{z + 2}{z + 2}$ .

$- 2 z + \frac{7 (z + 2)}{z + 2} - \frac{4 (z^{4} + z^{3} - 4 z^{2} - 11 z - 14)}{z + 2}$

Step 3

Combine the numerators over the common denominator.

$- 2 z + \frac{7 (z + 2) - 4 (z^{4} + z^{3} - 4 z^{2} - 11 z - 14)}{z + 2}$

Step 4

Simplify the numerator.

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Step 4.1

Apply the distributive property.

$- 2 z + \frac{7 z + 7 \cdot 2 - 4 (z^{4} + z^{3} - 4 z^{2} - 11 z - 14)}{z + 2}$

Step 4.2

Multiply $7$ by $2$ .

$- 2 z + \frac{7 z + 14 - 4 (z^{4} + z^{3} - 4 z^{2} - 11 z - 14)}{z + 2}$

Step 4.3

Apply the distributive property.

$- 2 z + \frac{7 z + 14 - 4 z^{4} - 4 z^{3} - 4 (- 4 z^{2}) - 4 (- 11 z) - 4 \cdot - 14}{z + 2}$

Step 4.4

Simplify.

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Step 4.4.1

Multiply $- 4$ by $- 4$ .

$- 2 z + \frac{7 z + 14 - 4 z^{4} - 4 z^{3} + 16 z^{2} - 4 (- 11 z) - 4 \cdot - 14}{z + 2}$

Step 4.4.2

Multiply $- 11$ by $- 4$ .

$- 2 z + \frac{7 z + 14 - 4 z^{4} - 4 z^{3} + 16 z^{2} + 44 z - 4 \cdot - 14}{z + 2}$

Step 4.4.3

Multiply $- 4$ by $- 14$ .

$- 2 z + \frac{7 z + 14 - 4 z^{4} - 4 z^{3} + 16 z^{2} + 44 z + 56}{z + 2}$

Step 4.5

Add $7 z$ and $44 z$ .

$- 2 z + \frac{14 - 4 z^{4} - 4 z^{3} + 16 z^{2} + 51 z + 56}{z + 2}$

Step 4.6

Add $14$ and $56$ .

$- 2 z + \frac{- 4 z^{4} - 4 z^{3} + 16 z^{2} + 51 z + 70}{z + 2}$

Step 5

To write $- 2 z$ as a fraction with a common denominator, multiply by $\frac{z + 2}{z + 2}$ .

$- 2 z \cdot \frac{z + 2}{z + 2} + \frac{- 4 z^{4} - 4 z^{3} + 16 z^{2} + 51 z + 70}{z + 2}$

Step 6

Simplify terms.

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Step 6.1

Combine $- 2 z$ and $\frac{z + 2}{z + 2}$ .

$\frac{- 2 z (z + 2)}{z + 2} + \frac{- 4 z^{4} - 4 z^{3} + 16 z^{2} + 51 z + 70}{z + 2}$

Step 6.2

Combine the numerators over the common denominator.

$\frac{- 2 z (z + 2) - 4 z^{4} - 4 z^{3} + 16 z^{2} + 51 z + 70}{z + 2}$

Step 7

Simplify the numerator.

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Step 7.1

Apply the distributive property.

$\frac{- 2 z \cdot z - 2 z \cdot 2 - 4 z^{4} - 4 z^{3} + 16 z^{2} + 51 z + 70}{z + 2}$

Step 7.2

Multiply $z$ by $z$ by adding the exponents.

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Step 7.2.1

Move $z$ .

$\frac{- 2 (z \cdot z) - 2 z \cdot 2 - 4 z^{4} - 4 z^{3} + 16 z^{2} + 51 z + 70}{z + 2}$

Step 7.2.2

Multiply $z$ by $z$ .

$\frac{- 2 z^{2} - 2 z \cdot 2 - 4 z^{4} - 4 z^{3} + 16 z^{2} + 51 z + 70}{z + 2}$

Step 7.3

Multiply $2$ by $- 2$ .

$\frac{- 2 z^{2} - 4 z - 4 z^{4} - 4 z^{3} + 16 z^{2} + 51 z + 70}{z + 2}$

Step 7.4

Add $- 2 z^{2}$ and $16 z^{2}$ .

$\frac{- 4 z - 4 z^{4} - 4 z^{3} + 14 z^{2} + 51 z + 70}{z + 2}$

Step 7.5

Add $- 4 z$ and $51 z$ .

$\frac{- 4 z^{4} - 4 z^{3} + 14 z^{2} + 47 z + 70}{z + 2}$

Step 8

Simplify with factoring out.

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Step 8.1

Factor $- 1$ out of $- 4 z^{4}$ .

$\frac{- (4 z^{4}) - 4 z^{3} + 14 z^{2} + 47 z + 70}{z + 2}$

Step 8.2

Factor $- 1$ out of $- 4 z^{3}$ .

$\frac{- (4 z^{4}) - (4 z^{3}) + 14 z^{2} + 47 z + 70}{z + 2}$

Step 8.3

Factor $- 1$ out of $- (4 z^{4}) - (4 z^{3})$ .

$\frac{- (4 z^{4} + 4 z^{3}) + 14 z^{2} + 47 z + 70}{z + 2}$

Step 8.4

Factor $- 1$ out of $14 z^{2}$ .

$\frac{- (4 z^{4} + 4 z^{3}) - (- 14 z^{2}) + 47 z + 70}{z + 2}$

Step 8.5

Factor $- 1$ out of $- (4 z^{4} + 4 z^{3}) - (- 14 z^{2})$ .

$\frac{- (4 z^{4} + 4 z^{3} - 14 z^{2}) + 47 z + 70}{z + 2}$

Step 8.6

Factor $- 1$ out of $47 z$ .

$\frac{- (4 z^{4} + 4 z^{3} - 14 z^{2}) - (- 47 z) + 70}{z + 2}$

Step 8.7

Factor $- 1$ out of $- (4 z^{4} + 4 z^{3} - 14 z^{2}) - (- 47 z)$ .

$\frac{- (4 z^{4} + 4 z^{3} - 14 z^{2} - 47 z) + 70}{z + 2}$

Step 8.8

Rewrite $70$ as $- 1 (- 70)$ .

$\frac{- (4 z^{4} + 4 z^{3} - 14 z^{2} - 47 z) - 1 (- 70)}{z + 2}$

Step 8.9

Factor $- 1$ out of $- (4 z^{4} + 4 z^{3} - 14 z^{2} - 47 z) - 1 (- 70)$ .

$\frac{- (4 z^{4} + 4 z^{3} - 14 z^{2} - 47 z - 70)}{z + 2}$

Step 8.10

Simplify the expression.

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Step 8.10.1

Rewrite $- (4 z^{4} + 4 z^{3} - 14 z^{2} - 47 z - 70)$ as $- 1 (4 z^{4} + 4 z^{3} - 14 z^{2} - 47 z - 70)$ .

$\frac{- 1 (4 z^{4} + 4 z^{3} - 14 z^{2} - 47 z - 70)}{z + 2}$

Step 8.10.2

Move the negative in front of the fraction.

$- \frac{4 z^{4} + 4 z^{3} - 14 z^{2} - 47 z - 70}{z + 2}$