Question

(x^2+x+1)(x-1)-0,5(2x-1)(2x+1)

Answer 1

(х³+х²+х-х²-х-1)-0.5(4х²-1)=(х³-1)-0.5(4х²-1)=(х³-1)-2х²+0.5=х³-1-2х²+0.5=х³-2х²-0.5

Answer 2

спасибо