Question

HELP!!
Has the polynomial below been factored correctly and completely?
x5 - 16x3 + 8x2 - 128
x3(x2 - 16) + 8(x2 - 16)
(x2 -16)(x3 + 8)

Answer 1

Or not. Keep trying.

Answer 2

correctly and completely

so completely not is sure because these factors can being again factorized ,like
a^2 -b^2 = (a-b)(a+b) and
a^3 +b^3 = (a+b)(a^2 -ab +b^2)

hope these will help you ending it easy and right