9(x-1)²=4(x-5)²
问题描述:
9(x-1)²=4(x-5)²
答
(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