Basic Math Examples

$\frac{a^{2} - a - 6}{a^{2} - 27} \cdot \frac{a^{2} + 3 a + 9}{6}$

Step 1

Factor $a^{2} - a - 6$ 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 $- 6$ and whose sum is $- 1$ .

$- 3, 2$

Step 1.2

Write the factored form using these integers.

$\frac{(a - 3) (a + 2)}{a^{2} - 27} \cdot \frac{a^{2} + 3 a + 9}{6}$

Step 2

Combine fractions.

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Step 2.1

Multiply $\frac{(a - 3) (a + 2)}{a^{2} - 27}$ by $\frac{a^{2} + 3 a + 9}{6}$ .

$\frac{(a - 3) (a + 2) (a^{2} + 3 a + 9)}{(a^{2} - 27) \cdot 6}$

Step 2.2

Move $6$ to the left of $a^{2} - 27$ .

$\frac{(a - 3) (a + 2) (a^{2} + 3 a + 9)}{6 (a^{2} - 27)}$