Question

Упростите выражение 
(a-4)^2+(2+a)(2-a)-4(3-2a)

Answer 1

a²-8a+16+4-2a+2a-a²-12+8a=8

Answer 2

(а-4)^2+(2+а)(2-а)-4(3-2а) = а^2-8а+16+4-а^2-12-8а = 8-16а = 8(1-2а)