Intermediate Algebra (6th Edition)

$2x^{2}$ - 32 = (2x + 8)(x - 4) Check by multiplying factors with FOIL: 2x(x) + 2x(-4) + 8(x) + 8(-4) = 2$x^{2}$ - 8x + 8x - 32 = 2$x^{2}$ - 32