Finite Math Examples

$\frac{x^{2} - 9}{x^{3} + 2 x^{2} - 45}$

Step 1

Rewrite $9$ as $3^{2}$ .

$\frac{x^{2} - 3^{2}}{x^{3} + 2 x^{2} - 45}$

Step 2

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = x$ and $b = 3$ .

$\frac{(x + 3) (x - 3)}{x^{3} + 2 x^{2} - 45}$