Question

номер 913 срочно пожалуйста

Answer 1

Б
2(y-1)-(1-y)²=0
2(y-1)-(y-1)²=0
(y-1)(2-(y-1))=0
(y-1)(3-y)=0
y=1
y=3
г
(y-3)²-4(3-y)=0
(y-3)²+4(y-3)=0
(y-3)(y-3+4)=0
y=1
y=-1