Algebra Examples

${(\frac{x}{5} - \frac{y}{3})}^{3}$

Step 1

Use the Binomial Theorem.

${(\frac{x}{5})}^{3} + 3 {(\frac{x}{5})}^{2} (- \frac{y}{3}) + 3 \frac{x}{5} {(- \frac{y}{3})}^{2} + {(- \frac{y}{3})}^{3}$

Step 2

Simplify each term.

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Step 2.1

Apply the product rule to $\frac{x}{5}$ .

$\frac{x^{3}}{5^{3}} + 3 {(\frac{x}{5})}^{2} (- \frac{y}{3}) + 3 \frac{x}{5} {(- \frac{y}{3})}^{2} + {(- \frac{y}{3})}^{3}$

Step 2.2

Raise $5$ to the power of $3$ .

$\frac{x^{3}}{125} + 3 {(\frac{x}{5})}^{2} (- \frac{y}{3}) + 3 \frac{x}{5} {(- \frac{y}{3})}^{2} + {(- \frac{y}{3})}^{3}$

Step 2.3

Cancel the common factor of $3$ .

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Step 2.3.1

Move the leading negative in $- \frac{y}{3}$ into the numerator.

$\frac{x^{3}}{125} + 3 {(\frac{x}{5})}^{2} \frac{- y}{3} + 3 \frac{x}{5} {(- \frac{y}{3})}^{2} + {(- \frac{y}{3})}^{3}$

Step 2.3.2

Factor $3$ out of $3 {(\frac{x}{5})}^{2}$ .

$\frac{x^{3}}{125} + 3 ({(\frac{x}{5})}^{2}) \frac{- y}{3} + 3 \frac{x}{5} {(- \frac{y}{3})}^{2} + {(- \frac{y}{3})}^{3}$

Step 2.3.3

Cancel the common factor.

$\frac{x^{3}}{125} + 3 {(\frac{x}{5})}^{2} \frac{- y}{3} + 3 \frac{x}{5} {(- \frac{y}{3})}^{2} + {(- \frac{y}{3})}^{3}$

Step 2.3.4

Rewrite the expression.

$\frac{x^{3}}{125} + {(\frac{x}{5})}^{2} (- y) + 3 \frac{x}{5} {(- \frac{y}{3})}^{2} + {(- \frac{y}{3})}^{3}$

Step 2.4

Rewrite using the commutative property of multiplication.

$\frac{x^{3}}{125} - {(\frac{x}{5})}^{2} y + 3 \frac{x}{5} {(- \frac{y}{3})}^{2} + {(- \frac{y}{3})}^{3}$

Step 2.5

Apply the product rule to $\frac{x}{5}$ .

$\frac{x^{3}}{125} - \frac{x^{2}}{5^{2}} y + 3 \frac{x}{5} {(- \frac{y}{3})}^{2} + {(- \frac{y}{3})}^{3}$

Step 2.6

Raise $5$ to the power of $2$ .

$\frac{x^{3}}{125} - \frac{x^{2}}{25} y + 3 \frac{x}{5} {(- \frac{y}{3})}^{2} + {(- \frac{y}{3})}^{3}$

Step 2.7

Combine $y$ and $\frac{x^{2}}{25}$ .

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + 3 \frac{x}{5} {(- \frac{y}{3})}^{2} + {(- \frac{y}{3})}^{3}$

Step 2.8

Combine $3$ and $\frac{x}{5}$ .

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + \frac{3 x}{5} {(- \frac{y}{3})}^{2} + {(- \frac{y}{3})}^{3}$

Step 2.9

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

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Step 2.9.1

Apply the product rule to $- \frac{y}{3}$ .

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + \frac{3 x}{5} ({(- 1)}^{2} {(\frac{y}{3})}^{2}) + {(- \frac{y}{3})}^{3}$

Step 2.9.2

Apply the product rule to $\frac{y}{3}$ .

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + \frac{3 x}{5} ({(- 1)}^{2} \frac{y^{2}}{3^{2}}) + {(- \frac{y}{3})}^{3}$

Step 2.10

Rewrite using the commutative property of multiplication.

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + {(- 1)}^{2} \frac{3 x}{5} \frac{y^{2}}{3^{2}} + {(- \frac{y}{3})}^{3}$

Step 2.11

Raise $- 1$ to the power of $2$ .

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + 1 \frac{3 x}{5} \frac{y^{2}}{3^{2}} + {(- \frac{y}{3})}^{3}$

Step 2.12

Multiply $\frac{3 x}{5}$ by $1$ .

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + \frac{3 x}{5} \cdot \frac{y^{2}}{3^{2}} + {(- \frac{y}{3})}^{3}$

Step 2.13

Combine.

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + \frac{3 x y^{2}}{5 \cdot 3^{2}} + {(- \frac{y}{3})}^{3}$

Step 2.14

Cancel the common factor of $3$ and $3^{2}$ .

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Step 2.14.1

Factor $3$ out of $3 x y^{2}$ .

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + \frac{3 (x y^{2})}{5 \cdot 3^{2}} + {(- \frac{y}{3})}^{3}$

Step 2.14.2

Cancel the common factors.

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Step 2.14.2.1

Factor $3$ out of $5 \cdot 3^{2}$ .

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + \frac{3 (x y^{2})}{3 (5 \cdot 3)} + {(- \frac{y}{3})}^{3}$

Step 2.14.2.2

Cancel the common factor.

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + \frac{3 (x y^{2})}{3 (5 \cdot 3)} + {(- \frac{y}{3})}^{3}$

Step 2.14.2.3

Rewrite the expression.

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + \frac{x y^{2}}{5 \cdot 3} + {(- \frac{y}{3})}^{3}$

Step 2.15

Multiply $5$ by $3$ .

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + \frac{x y^{2}}{15} + {(- \frac{y}{3})}^{3}$

Step 2.16

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

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Step 2.16.1

Apply the product rule to $- \frac{y}{3}$ .

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + \frac{x y^{2}}{15} + {(- 1)}^{3} {(\frac{y}{3})}^{3}$

Step 2.16.2

Apply the product rule to $\frac{y}{3}$ .

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + \frac{x y^{2}}{15} + {(- 1)}^{3} \frac{y^{3}}{3^{3}}$

Step 2.17

Raise $- 1$ to the power of $3$ .

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + \frac{x y^{2}}{15} - \frac{y^{3}}{3^{3}}$

Step 2.18

Raise $3$ to the power of $3$ .

$\frac{x^{3}}{125} - \frac{y x^{2}}{25} + \frac{x y^{2}}{15} - \frac{y^{3}}{27}$