Question

factorize x³+x²-80 by using x³-64

Answer 1

Answer:

u have to know how to factor.

Step-by-step explanation:

Answer 2

Answer:

$x^3- 64 +x^2 - 16 \\=( x^3 -4^3) +( x^2 -4^2)\\=(x-4)(x^2 + 4^2 + 4x) +(x-4)(x+4)\\=(x-4)[(x^2+4^2+4x) +(x+4)]\\=(x-4)(x^2+16+4x+x+4)\\=(x-4)(x^2+5x +20)$

Step-by-step explanation: