Precalculus Examples

${(\frac{x y^{- 3} z^{- 2}}{x^{2} y^{4} z^{- 3}})}^{- 3}$

Step 1

Move $y^{- 3}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

${(\frac{x z^{- 2}}{x^{2} y^{4} z^{- 3} y^{3}})}^{- 3}$

Step 2

Multiply $y^{4}$ by $y^{3}$ by adding the exponents.

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Step 2.1

Move $y^{3}$ .

${(\frac{x z^{- 2}}{x^{2} (y^{3} y^{4}) z^{- 3}})}^{- 3}$

Step 2.2

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

${(\frac{x z^{- 2}}{x^{2} y^{3 + 4} z^{- 3}})}^{- 3}$

Step 2.3

Add $3$ and $4$ .

${(\frac{x z^{- 2}}{x^{2} y^{7} z^{- 3}})}^{- 3}$

Step 3

Move $z^{- 3}$ to the numerator using the negative exponent rule $\frac{1}{b^{- n}} = b^{n}$ .

${(\frac{x z^{- 2} z^{3}}{x^{2} y^{7}})}^{- 3}$

Step 4

Simplify the numerator.

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Step 4.1

Multiply $z^{- 2}$ by $z^{3}$ by adding the exponents.

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Step 4.1.1

Move $z^{3}$ .

${(\frac{x (z^{3} z^{- 2})}{x^{2} y^{7}})}^{- 3}$

Step 4.1.2

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

${(\frac{x z^{3 - 2}}{x^{2} y^{7}})}^{- 3}$

Step 4.1.3

Subtract $2$ from $3$ .

${(\frac{x z^{1}}{x^{2} y^{7}})}^{- 3}$

Step 4.2

Simplify $x z^{1}$ .

${(\frac{x z}{x^{2} y^{7}})}^{- 3}$

Step 5

Cancel the common factor of $x$ and $x^{2}$ .

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Step 5.1

Factor $x$ out of $x z$ .

${(\frac{x (z)}{x^{2} y^{7}})}^{- 3}$

Step 5.2

Cancel the common factors.

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Step 5.2.1

Factor $x$ out of $x^{2} y^{7}$ .

${(\frac{x (z)}{x (x y^{7})})}^{- 3}$

Step 5.2.2

Cancel the common factor.

${(\frac{x z}{x (x y^{7})})}^{- 3}$

Step 5.2.3

Rewrite the expression.

${(\frac{z}{x y^{7}})}^{- 3}$

Step 6

Change the sign of the exponent by rewriting the base as its reciprocal.

${(\frac{x y^{7}}{z})}^{3}$

Step 7

Use the power rule ${(a b)}^{n} = a^{n} b^{n}$ to distribute the exponent.

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Step 7.1

Apply the product rule to $\frac{x y^{7}}{z}$ .

$\frac{{(x y^{7})}^{3}}{z^{3}}$

Step 7.2

Apply the product rule to $x y^{7}$ .

$\frac{x^{3} {(y^{7})}^{3}}{z^{3}}$

Step 8

Multiply the exponents in ${(y^{7})}^{3}$ .

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Step 8.1

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

$\frac{x^{3} y^{7 \cdot 3}}{z^{3}}$

Step 8.2

Multiply $7$ by $3$ .

$\frac{x^{3} y^{21}}{z^{3}}$