Question

Упростите выражение: (х+2)(х-2)-(х+2)в квадрате.​

Answer 1

(х+2)(х-2)-(х+2)² = (х+2)(х-2-(х+2)) = (х+2)(х-2-х-2) = (х+2) × (-4) = -4(х+2) = -4х -8

Answer 2

=х²-2х+2х-4-х²-4х-4=-4х-8