9(x-1)²=4(x-5)²

问题描述:

9(x-1)²=4(x-5)²

(3(x-1))^2-(2(x-5))^2=0
(3x-3-2x+10)(3x-3+2x-10)=0
(x+7)(5x-13)=0
所以x=-7或者13/5