## College Algebra (10th Edition)

$-(3x-1)(3x+1)(x^{2}+1)$
We factor: $1-8x^{2}-9x^{4}$ First we rearrange the terms: $-9x^{4}-8x^{2}+1$ Next we factor out -1: $-(9x^{4}+8x^{2}-1)$ Next we factor in two parts: $-(9x^{2}-1)(x^{2}+1)$ Next we use the fact that $(a-b)(a+b)=a^2-b^2$ $-(3x-1)(3x+1)(x^{2}+1)$