4〔x-1〕^2-9〔x+1〕^2=0
问题描述:
4〔x-1〕^2-9〔x+1〕^2=0
答
4〔x-1〕^2-9〔x+1〕^2=0
(2x-2)^2 - (3x+3)^2 = 0
(5x+1)*(-x-5) = 0
x1 = -1/5
x2 = - 5