Question

решите плиз

(a-2)(a+4)-(a+1)^2 

Answer 1

$(a-2)(a+4)-(a+1)^2=a^2-2a+4a-8-a^2-2a-1=-9$

Answer 2

(a-2)(a+4-(a^2 +2a+1)= a^2 +4a-2a-8-a^2 -2a-1=-9