Algebra Examples

$x \sqrt{784 - x^{2}}$

Step 1

Rewrite $784$ as $28^{2}$ .

$x \sqrt{28^{2} - x^{2}}$

Step 2

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = 28$ and $b = x$ .

$x \sqrt{(28 + x) (28 - x)}$

Step 3

The degree cannot be determined because $x \sqrt{(28 + x) (28 - x)}$ is not a polynomial.

Not a polynomial