Algebra Examples

$64 - 25 x^{2}$

Step 1

Rewrite $64$ as $8^{2}$ .

$8^{2} - 25 x^{2}$

Step 2

Rewrite $25 x^{2}$ as ${(5 x)}^{2}$ .

$8^{2} - {(5 x)}^{2}$

Step 3

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = 8$ and $b = 5 x$ .

$(8 + 5 x) (8 - (5 x))$

Step 4

Multiply $5$ by $- 1$ .

$(8 + 5 x) (8 - 5 x)$