1.x(x-4)+2(4-x)=0

问题描述:

1.x(x-4)+2(4-x)=0
2.(3x-1)^2=(x-3)^2


x(x-4)-2(x-4)=0
(x-2)(x-4)=0
所以x=2或x=4

(3x-1)^2-(x-3)^2=0
(3x-1+x-3)(3x-1-x+3)=0
(4x-4)(2x+2)=0
(x-1)(x+1)=0
所以x=1或x=-1