Question

(y−3)(y+8)+(y+8)(y−2)=0
4y ^3 +12y ^2+9y=0
4y ^2 −64=0
ДАЮ 20 БАЛЛОВ

Answer 1

(y+8)(y-3+y-2)=0
(y+8)(2y-5)=0
y=-8
y=2,5
(4y^2+12y+9)y=0
y=0
(2y+3)^2=0
y=-3/2
y^2=64/4
y^2=16
y=+-4