Basic Math Examples

$\frac{y^{4} - 8 y^{3} + 5 y^{2} - 40 y}{7 y^{3} + 56 y^{2} + 2 y + 16} \div \frac{y^{3} - 2 y^{2} + 5 y - 10}{7 y^{3} - 14 y^{2} + 2 y - 4}$

Step 1

To divide by a fraction, multiply by its reciprocal.

$\frac{y^{4} - 8 y^{3} + 5 y^{2} - 40 y}{7 y^{3} + 56 y^{2} + 2 y + 16} \cdot \frac{7 y^{3} - 14 y^{2} + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 2

Simplify the numerator.

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Step 2.1

Factor $y$ out of $y^{4} - 8 y^{3} + 5 y^{2} - 40 y$ .

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Step 2.1.1

Factor $y$ out of $y^{4}$ .

$\frac{y \cdot y^{3} - 8 y^{3} + 5 y^{2} - 40 y}{7 y^{3} + 56 y^{2} + 2 y + 16} \cdot \frac{7 y^{3} - 14 y^{2} + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 2.1.2

Factor $y$ out of $- 8 y^{3}$ .

$\frac{y \cdot y^{3} + y (- 8 y^{2}) + 5 y^{2} - 40 y}{7 y^{3} + 56 y^{2} + 2 y + 16} \cdot \frac{7 y^{3} - 14 y^{2} + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 2.1.3

Factor $y$ out of $5 y^{2}$ .

$\frac{y \cdot y^{3} + y (- 8 y^{2}) + y (5 y) - 40 y}{7 y^{3} + 56 y^{2} + 2 y + 16} \cdot \frac{7 y^{3} - 14 y^{2} + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 2.1.4

Factor $y$ out of $- 40 y$ .

$\frac{y \cdot y^{3} + y (- 8 y^{2}) + y (5 y) + y \cdot - 40}{7 y^{3} + 56 y^{2} + 2 y + 16} \cdot \frac{7 y^{3} - 14 y^{2} + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 2.1.5

Factor $y$ out of $y \cdot y^{3} + y (- 8 y^{2})$ .

$\frac{y (y^{3} - 8 y^{2}) + y (5 y) + y \cdot - 40}{7 y^{3} + 56 y^{2} + 2 y + 16} \cdot \frac{7 y^{3} - 14 y^{2} + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 2.1.6

Factor $y$ out of $y (y^{3} - 8 y^{2}) + y (5 y)$ .

$\frac{y (y^{3} - 8 y^{2} + 5 y) + y \cdot - 40}{7 y^{3} + 56 y^{2} + 2 y + 16} \cdot \frac{7 y^{3} - 14 y^{2} + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 2.1.7

Factor $y$ out of $y (y^{3} - 8 y^{2} + 5 y) + y \cdot - 40$ .

$\frac{y (y^{3} - 8 y^{2} + 5 y - 40)}{7 y^{3} + 56 y^{2} + 2 y + 16} \cdot \frac{7 y^{3} - 14 y^{2} + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 2.2

Factor out the greatest common factor from each group.

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Step 2.2.1

Group the first two terms and the last two terms.

$\frac{y ((y^{3} - 8 y^{2}) + 5 y - 40)}{7 y^{3} + 56 y^{2} + 2 y + 16} \cdot \frac{7 y^{3} - 14 y^{2} + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 2.2.2

Factor out the greatest common factor (GCF) from each group.

$\frac{y (y^{2} (y - 8) + 5 (y - 8))}{7 y^{3} + 56 y^{2} + 2 y + 16} \cdot \frac{7 y^{3} - 14 y^{2} + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 2.3

Factor the polynomial by factoring out the greatest common factor, $y - 8$ .

$\frac{y (y - 8) (y^{2} + 5)}{7 y^{3} + 56 y^{2} + 2 y + 16} \cdot \frac{7 y^{3} - 14 y^{2} + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 3

Simplify the denominator.

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Step 3.1

Factor out the greatest common factor from each group.

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Step 3.1.1

Group the first two terms and the last two terms.

$\frac{y (y - 8) (y^{2} + 5)}{(7 y^{3} + 56 y^{2}) + 2 y + 16} \cdot \frac{7 y^{3} - 14 y^{2} + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 3.1.2

Factor out the greatest common factor (GCF) from each group.

$\frac{y (y - 8) (y^{2} + 5)}{7 y^{2} (y + 8) + 2 (y + 8)} \cdot \frac{7 y^{3} - 14 y^{2} + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 3.2

Factor the polynomial by factoring out the greatest common factor, $y + 8$ .

$\frac{y (y - 8) (y^{2} + 5)}{(y + 8) (7 y^{2} + 2)} \cdot \frac{7 y^{3} - 14 y^{2} + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 4

Simplify the numerator.

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Step 4.1

Factor out the greatest common factor from each group.

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Step 4.1.1

Group the first two terms and the last two terms.

$\frac{y (y - 8) (y^{2} + 5)}{(y + 8) (7 y^{2} + 2)} \cdot \frac{(7 y^{3} - 14 y^{2}) + 2 y - 4}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 4.1.2

Factor out the greatest common factor (GCF) from each group.

$\frac{y (y - 8) (y^{2} + 5)}{(y + 8) (7 y^{2} + 2)} \cdot \frac{7 y^{2} (y - 2) + 2 (y - 2)}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 4.2

Factor the polynomial by factoring out the greatest common factor, $y - 2$ .

$\frac{y (y - 8) (y^{2} + 5)}{(y + 8) (7 y^{2} + 2)} \cdot \frac{(y - 2) (7 y^{2} + 2)}{y^{3} - 2 y^{2} + 5 y - 10}$

Step 5

Simplify the denominator.

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Step 5.1

Factor out the greatest common factor from each group.

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Step 5.1.1

Group the first two terms and the last two terms.

$\frac{y (y - 8) (y^{2} + 5)}{(y + 8) (7 y^{2} + 2)} \cdot \frac{(y - 2) (7 y^{2} + 2)}{(y^{3} - 2 y^{2}) + 5 y - 10}$

Step 5.1.2

Factor out the greatest common factor (GCF) from each group.

$\frac{y (y - 8) (y^{2} + 5)}{(y + 8) (7 y^{2} + 2)} \cdot \frac{(y - 2) (7 y^{2} + 2)}{y^{2} (y - 2) + 5 (y - 2)}$

Step 5.2

Factor the polynomial by factoring out the greatest common factor, $y - 2$ .

$\frac{y (y - 8) (y^{2} + 5)}{(y + 8) (7 y^{2} + 2)} \cdot \frac{(y - 2) (7 y^{2} + 2)}{(y - 2) (y^{2} + 5)}$

Step 6

Simplify terms.

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Step 6.1

Combine.

$\frac{y (y - 8) (y^{2} + 5) ((y - 2) (7 y^{2} + 2))}{(y + 8) (7 y^{2} + 2) ((y - 2) (y^{2} + 5))}$

Step 6.2

Cancel the common factor of $y^{2} + 5$ .

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Step 6.2.1

Cancel the common factor.

$\frac{y (y - 8) (y^{2} + 5) ((y - 2) (7 y^{2} + 2))}{(y + 8) (7 y^{2} + 2) ((y - 2) (y^{2} + 5))}$

Step 6.2.2

Rewrite the expression.

$\frac{y (y - 8) ((y - 2) (7 y^{2} + 2))}{(y + 8) (7 y^{2} + 2) (y - 2)}$

Step 6.3

Cancel the common factor of $y - 2$ .

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Step 6.3.1

Cancel the common factor.

$\frac{y (y - 8) ((y - 2) (7 y^{2} + 2))}{(y + 8) (7 y^{2} + 2) (y - 2)}$

Step 6.3.2

Rewrite the expression.

$\frac{y (y - 8) (7 y^{2} + 2)}{(y + 8) (7 y^{2} + 2)}$

Step 6.4

Cancel the common factor of $7 y^{2} + 2$ .

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Step 6.4.1

Cancel the common factor.

$\frac{y (y - 8) (7 y^{2} + 2)}{(y + 8) (7 y^{2} + 2)}$

Step 6.4.2

Rewrite the expression.

$\frac{y (y - 8)}{y + 8}$