# How do you factor 16 - x^4?

Feb 10, 2017

$16 - {x}^{4} = \left(4 + {x}^{2}\right) \left(4 - {x}^{2}\right)$
It is in the form $\left(a + b\right) \left(a - b\right) = {a}^{2} - {b}^{2}$
$16 - {x}^{4} = \left(4 + {x}^{2}\right) \left(4 - {x}^{2}\right)$