Question

Спростити вираз (х+2)(Х2-2х+4)-(х-1)(х2+2)

Answer 1

х³-2х²+х+2х²-4х+8-(х³+2х-х²-2) =

= х³-3х+8 - х³-2х+х²+2 =

= -5х+10+х² =

= х²-5х+10