Question

which of the following expressions is equivalent to the polynomial below? (8x-1)(64x^2+8x+1)

Answer 1

Given the expression

$(8x-1)\left(64x^2+8x+1\right)$

simplifying

$(8x)(64x^2+8x+1)-(1)(64x^2+8x+1)$$(512x^3+64x^2+8x)-(64x^2+8x+1)$$(512x^3)-(+1)$$(512x^3-1)$

then the correct answer is

option A

512x^3 - 1