Question

Упростите выражение: (х-4)(х+2)-(х-2)^2

Answer 1

x^2+2x-4x-8 - x^2 +4x-4 = 2x-12

Answer 2

(x-4)(x+2)-(x-2)^2
x^2+2x-4x-8-(x^2-4x+4)=x^2-2x-8-x^2+4x-4=2x-12