9(x-2)^2=4(x-1)^2
9(x-2)^2-4(x-1)^2=0
[3（x-2)+2(x-1)][3（x-2)-2(x-1)]=0
(3x-6+2x-2)(3x-6-2x+2)=0
(5x-8)(x-4)=0
x=8/5或x=4谢谢，亲