Question

(4+y)²-y(y-1) при х=-1/9
(х-4)²-2х(5х-4) при х=-1/3

Answer 1

(4+y)²-y*(y-1)=16+8y+y²-y²+y=9y+16
-1+16=15
(x-4)²-2x*(5x-4)=x²-8x+16-10x²+8x=-9x²+16
-1+16=15

Answer 2

Вот на фото...........