(y+3)²=2y+6

(y+3)²=2y+6
(y+3)²- 2(y+3) = 0
(y+3) (y+3-2) = 0
y = -3 或者 y = -1
施主,我看你骨骼清奇,
器宇轩昂,且有慧根,
乃是万中无一的武林奇才.
潜心修习,将来必成大器,
鄙人有个小小的考验请点击在下答案旁的
"选为满意答案"