Question

упростите выражение (x-2)-(x-1)(x+2)

Answer 1

(x-2)-(x-1)(x+2)=х-2-(х²+2х-х-2)=х-2-х²-2х+х+2=-х²

Answer 2

(x-2)-(x-1)(x+2)=(X-2)-X²-2X+X+2=-x²