РЕШИТЕ СРОЧНО (y-4)*(y+2)-(y-2)^2

Question

РЕШИТЕ СРОЧНО (y-4)*(y+2)-(y-2)^2

Answer 1

(у-4)*(у+2)-(у-2)^2=у^2-4y+2y-8-(y^2-4y+4)= y^2-2y-8-y^2+4y-4=2y-12

Answer 2

= y^2 + 2y - 4y - 8 - ( y^2 - 4y + 4 ) = y^2 - 2y - 8 - y^2 + 4y - 4 = 2y - 12
Ответ 2y - 12