(y+3)^2=(5-3y)^2
问题描述：
(y+3)^2=(5-3y)^2
解方程,
答
(y+3)²-(5-3y)²=0
(y+3+5-3y)(y+3-5+3y)=0
(-2y+8)(4y-2)=0
-4(y-4)(2y-1)=0
y=4,y=1/2