Basic Math Examples

$\frac{c^{5} y^{3}}{c^{2} + 13 x + 42} \cdot \frac{c^{2} + 4 c - 21}{c^{9} y^{2}}$

Step 1

Factor $c^{2} + 4 c - 21$ using the AC method.

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Step 1.1

Consider the form $x^{2} + b x + c$ . Find a pair of integers whose product is $c$ and whose sum is $b$ . In this case, whose product is $- 21$ and whose sum is $4$ .

$- 3, 7$

Step 1.2

Write the factored form using these integers.

$\frac{c^{5} y^{3}}{c^{2} + 13 x + 42} \cdot \frac{(c - 3) (c + 7)}{c^{9} y^{2}}$

Step 2

Simplify terms.

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Step 2.1

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

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Step 2.1.1

Factor $c^{5} y^{2}$ out of $c^{5} y^{3}$ .

$\frac{c^{5} y^{2} (y)}{c^{2} + 13 x + 42} \cdot \frac{(c - 3) (c + 7)}{c^{9} y^{2}}$

Step 2.1.2

Factor $c^{5} y^{2}$ out of $c^{9} y^{2}$ .

$\frac{c^{5} y^{2} (y)}{c^{2} + 13 x + 42} \cdot \frac{(c - 3) (c + 7)}{c^{5} y^{2} (c^{4})}$

Step 2.1.3

Cancel the common factor.

$\frac{c^{5} y^{2} y}{c^{2} + 13 x + 42} \cdot \frac{(c - 3) (c + 7)}{c^{5} y^{2} c^{4}}$

Step 2.1.4

Rewrite the expression.

$\frac{y}{c^{2} + 13 x + 42} \cdot \frac{(c - 3) (c + 7)}{c^{4}}$

Step 2.2

Multiply $\frac{y}{c^{2} + 13 x + 42}$ by $\frac{(c - 3) (c + 7)}{c^{4}}$ .

$\frac{y ((c - 3) (c + 7))}{(c^{2} + 13 x + 42) c^{4}}$

Step 2.3

Reorder factors in $\frac{y (c - 3) (c + 7)}{(c^{2} + 13 x + 42) c^{4}}$ .

$\frac{y (c - 3) (c + 7)}{c^{4} (c^{2} + 13 x + 42)}$