# How do you factor 3x^4-300x^2?

$3 {x}^{4} - 300 {x}^{2} = 3 {x}^{2} \left(x - 10\right) \left(x + 10\right)$
$3 {x}^{4} - 300 {x}^{2} = 3 {x}^{2} \left({x}^{2} - 100\right) = 3 {x}^{2} \left(x - 10\right) \left(x + 10\right)$