Precalculus Examples

$\frac{2 x {(1 - x^{2})}^{\frac{1}{3}} + \frac{2}{3} x^{3} {(1 - x^{2})}^{- \frac{2}{3}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1

Simplify the numerator.

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Step 1.1

Factor $x$ out of $2 x {(1 - x^{2})}^{\frac{1}{3}} + \frac{2}{3} \cdot x^{3} {(1 - x^{2})}^{- \frac{2}{3}}$ .

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Step 1.1.1

Factor $x$ out of $2 x {(1 - x^{2})}^{\frac{1}{3}}$ .

$\frac{x (2 {(1 - x^{2})}^{\frac{1}{3}}) + \frac{2}{3} \cdot x^{3} {(1 - x^{2})}^{- \frac{2}{3}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.1.2

Factor $x$ out of $\frac{2}{3} \cdot x^{3} {(1 - x^{2})}^{- \frac{2}{3}}$ .

$\frac{x (2 {(1 - x^{2})}^{\frac{1}{3}}) + x (\frac{2}{3} \cdot x^{2} {(1 - x^{2})}^{- \frac{2}{3}})}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.1.3

Factor $x$ out of $x (2 {(1 - x^{2})}^{\frac{1}{3}}) + x (\frac{2}{3} \cdot x^{2} {(1 - x^{2})}^{- \frac{2}{3}})$ .

$\frac{x (2 {(1 - x^{2})}^{\frac{1}{3}} + \frac{2}{3} \cdot x^{2} {(1 - x^{2})}^{- \frac{2}{3}})}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.2

Combine $\frac{2}{3}$ and $x^{2}$ .

$\frac{x (2 {(1 - x^{2})}^{\frac{1}{3}} + \frac{2 x^{2}}{3} {(1 - x^{2})}^{- \frac{2}{3}})}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.3

Rewrite the expression using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{x (2 {(1 - x^{2})}^{\frac{1}{3}} + \frac{2 x^{2}}{3} \cdot \frac{1}{{(1 - x^{2})}^{\frac{2}{3}}})}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.4

Combine.

$\frac{x (2 {(1 - x^{2})}^{\frac{1}{3}} + \frac{2 x^{2} \cdot 1}{3 {(1 - x^{2})}^{\frac{2}{3}}})}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.5

Multiply $2$ by $1$ .

$\frac{x (2 {(1 - x^{2})}^{\frac{1}{3}} + \frac{2 x^{2}}{3 {(1 - x^{2})}^{\frac{2}{3}}})}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.6

To write $2 {(1 - x^{2})}^{\frac{1}{3}}$ as a fraction with a common denominator, multiply by $\frac{3 {(1 - x^{2})}^{\frac{2}{3}}}{3 {(1 - x^{2})}^{\frac{2}{3}}}$ .

$\frac{x (2 {(1 - x^{2})}^{\frac{1}{3}} \cdot \frac{3 {(1 - x^{2})}^{\frac{2}{3}}}{3 {(1 - x^{2})}^{\frac{2}{3}}} + \frac{2 x^{2}}{3 {(1 - x^{2})}^{\frac{2}{3}}})}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.7

Combine $2 {(1 - x^{2})}^{\frac{1}{3}}$ and $\frac{3 {(1 - x^{2})}^{\frac{2}{3}}}{3 {(1 - x^{2})}^{\frac{2}{3}}}$ .

$\frac{x (\frac{2 {(1 - x^{2})}^{\frac{1}{3}} (3 {(1 - x^{2})}^{\frac{2}{3}})}{3 {(1 - x^{2})}^{\frac{2}{3}}} + \frac{2 x^{2}}{3 {(1 - x^{2})}^{\frac{2}{3}}})}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.8

Combine the numerators over the common denominator.

$\frac{x \frac{2 {(1 - x^{2})}^{\frac{1}{3}} (3 {(1 - x^{2})}^{\frac{2}{3}}) + 2 x^{2}}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.9

Reorder terms.

$\frac{x \frac{2 x^{2} + 2 \cdot 3 {(1 - x^{2})}^{\frac{2}{3}} {(1 - x^{2})}^{\frac{1}{3}}}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.10

Rewrite $\frac{2 x^{2} + 2 \cdot 3 {(1 - x^{2})}^{\frac{2}{3}} {(1 - x^{2})}^{\frac{1}{3}}}{3 {(1 - x^{2})}^{\frac{2}{3}}}$ in a factored form.

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Step 1.10.1

Factor $2$ out of $2 x^{2} + 2 \cdot 3 {(1 - x^{2})}^{\frac{2}{3}} {(1 - x^{2})}^{\frac{1}{3}}$ .

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Step 1.10.1.1

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

$\frac{x \frac{2 (x^{2}) + 2 \cdot 3 {(1 - x^{2})}^{\frac{2}{3}} {(1 - x^{2})}^{\frac{1}{3}}}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.10.1.2

Factor $2$ out of $2 \cdot 3 {(1 - x^{2})}^{\frac{2}{3}} {(1 - x^{2})}^{\frac{1}{3}}$ .

$\frac{x \frac{2 (x^{2}) + 2 (3 {(1 - x^{2})}^{\frac{2}{3}} {(1 - x^{2})}^{\frac{1}{3}})}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.10.1.3

Factor $2$ out of $2 (x^{2}) + 2 (3 {(1 - x^{2})}^{\frac{2}{3}} {(1 - x^{2})}^{\frac{1}{3}})$ .

$\frac{x \frac{2 (x^{2} + 3 {(1 - x^{2})}^{\frac{2}{3}} {(1 - x^{2})}^{\frac{1}{3}})}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.10.2

Multiply ${(1 - x^{2})}^{\frac{2}{3}}$ by ${(1 - x^{2})}^{\frac{1}{3}}$ by adding the exponents.

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Step 1.10.2.1

Move ${(1 - x^{2})}^{\frac{1}{3}}$ .

$\frac{x \frac{2 (x^{2} + 3 ({(1 - x^{2})}^{\frac{1}{3}} {(1 - x^{2})}^{\frac{2}{3}}))}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.10.2.2

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

$\frac{x \frac{2 (x^{2} + 3 {(1 - x^{2})}^{\frac{1}{3} + \frac{2}{3}})}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.10.2.3

Combine the numerators over the common denominator.

$\frac{x \frac{2 (x^{2} + 3 {(1 - x^{2})}^{\frac{1 + 2}{3}})}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.10.2.4

Add $1$ and $2$ .

$\frac{x \frac{2 (x^{2} + 3 {(1 - x^{2})}^{\frac{3}{3}})}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.10.2.5

Divide $3$ by $3$ .

$\frac{x \frac{2 (x^{2} + 3 {(1 - x^{2})}^{1})}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.10.3

Simplify $3 {(1 - x^{2})}^{1}$ .

$\frac{x \frac{2 (x^{2} + 3 (1 - x^{2}))}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.10.4

Apply the distributive property.

$\frac{x \frac{2 (x^{2} + 3 \cdot 1 + 3 (- x^{2}))}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.10.5

Multiply $3$ by $1$ .

$\frac{x \frac{2 (x^{2} + 3 + 3 (- x^{2}))}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.10.6

Multiply $- 1$ by $3$ .

$\frac{x \frac{2 (x^{2} + 3 - 3 x^{2})}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 1.10.7

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

$\frac{x \frac{2 (- 2 x^{2} + 3)}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 2

Combine $x$ and $\frac{2 (- 2 x^{2} + 3)}{3 {(1 - x^{2})}^{\frac{2}{3}}}$ .

$\frac{\frac{x (2 (- 2 x^{2} + 3))}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 3

Move $2$ to the left of $x$ .

$\frac{\frac{2 x (- 2 x^{2} + 3)}{3 {(1 - x^{2})}^{\frac{2}{3}}}}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 4

Multiply the numerator by the reciprocal of the denominator.

$\frac{2 x (- 2 x^{2} + 3)}{3 {(1 - x^{2})}^{\frac{2}{3}}} \cdot \frac{1}{{(1 - x^{2})}^{\frac{2}{3}}}$

Step 5

Combine.

$\frac{2 x (- 2 x^{2} + 3) \cdot 1}{3 {(1 - x^{2})}^{\frac{2}{3}} {(1 - x^{2})}^{\frac{2}{3}}}$

Step 6

Multiply ${(1 - x^{2})}^{\frac{2}{3}}$ by ${(1 - x^{2})}^{\frac{2}{3}}$ by adding the exponents.

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Step 6.1

Move ${(1 - x^{2})}^{\frac{2}{3}}$ .

$\frac{2 x (- 2 x^{2} + 3) \cdot 1}{3 ({(1 - x^{2})}^{\frac{2}{3}} {(1 - x^{2})}^{\frac{2}{3}})}$

Step 6.2

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

$\frac{2 x (- 2 x^{2} + 3) \cdot 1}{3 {(1 - x^{2})}^{\frac{2}{3} + \frac{2}{3}}}$

Step 6.3

Combine the numerators over the common denominator.

$\frac{2 x (- 2 x^{2} + 3) \cdot 1}{3 {(1 - x^{2})}^{\frac{2 + 2}{3}}}$

Step 6.4

Add $2$ and $2$ .

$\frac{2 x (- 2 x^{2} + 3) \cdot 1}{3 {(1 - x^{2})}^{\frac{4}{3}}}$

Step 7

Multiply $2 x (- 2 x^{2} + 3)$ by $1$ .

$\frac{2 x (- 2 x^{2} + 3)}{3 {(1 - x^{2})}^{\frac{4}{3}}}$

Step 8

Factor $- 1$ out of $- 2 x^{2}$ .

$\frac{2 x (- (2 x^{2}) + 3)}{3 {(1 - x^{2})}^{\frac{4}{3}}}$

Step 9

Rewrite $3$ as $- 1 (- 3)$ .

$\frac{2 x (- (2 x^{2}) - 1 (- 3))}{3 {(1 - x^{2})}^{\frac{4}{3}}}$

Step 10

Factor $- 1$ out of $- (2 x^{2}) - 1 (- 3)$ .

$\frac{2 x (- (2 x^{2} - 3))}{3 {(1 - x^{2})}^{\frac{4}{3}}}$

Step 11

Simplify the expression.

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Step 11.1

Rewrite $- (2 x^{2} - 3)$ as $- 1 (2 x^{2} - 3)$ .

$\frac{2 x (- 1 (2 x^{2} - 3))}{3 {(1 - x^{2})}^{\frac{4}{3}}}$

Step 11.2

Move the negative in front of the fraction.

$- \frac{(2 x) (2 x^{2} - 3)}{3 {(1 - x^{2})}^{\frac{4}{3}}}$

Step 11.3

Reorder factors in $- \frac{(2 x) (2 x^{2} - 3)}{3 {(1 - x^{2})}^{\frac{4}{3}}}$ .

$- \frac{2 x (2 x^{2} - 3)}{3 {(1 - x^{2})}^{\frac{4}{3}}}$