## College Algebra (10th Edition)

$-2(2x-1)(2x+1)(x^{2}+2)$
We factor: $4-14x^{2}-8x^{4}$ First we factor out $-2$: $-2(4x^{4}+7x^{2}-2)$ Next we factor in two parts: $-2(4x^{2}-1)(x^{2}+2)$ Next we use the fact that $(a-b)(a+b)=a^2-b^2$: $-2(2x-1)(2x+1)(x^{2}+2)$