(a-2)(a+4)-(a+1)^2 упростите)

Question

(a-2)(a+4)-(a+1)^2 упростите)

Answer 1

A^2 + 2a -8 - a^2 - 2a - 1 = -9

Answer 2

А*2+4а-2в-8-а*2+2а+1=а^2=4a-2a-8-a^2-2a-1=4a-4a-8-1=-9