РЕШИТЕ ПЖ (y-4)^2-(4-y)(4+y)

Question

РЕШИТЕ ПЖ
(y-4)^2-(4-y)(4+y)

Answer 1

(y-4)^2-(4-y)(4+y) = (y-4)² + (y-4)(y+4)=(y-4)(y-4+y+4)=2y(y-4)

Answer 2

У^2-8y+16-(16-y^2)
y^2-8y+16-16+y^2
2y^2-8y