# How do you simplify 2x^4 - x^2?

${x}^{2} \left(2 {x}^{2} - 1\right)$
$2 {x}^{4} - {x}^{2}$
Factor out the GCF ${x}^{2}$.
${x}^{2} \left(2 {x}^{2} - 1\right)$