4(x-1)^2=9(x+3)^2
9(x+3)^2-4(x-1)^2=0
[3(x+3)]?-[2(x-1)]?=0
[3(x+3)+2(x-1)][3(x+3)-2(x-1)]=0
(5x+7)((x+11)=0
所以x=-7/5或-11
4(x-1)^2=9(x+3)^2
9(x+3)^2-4(x-1)^2=0
[3(x+3)]?-[2(x-1)]?=0
[3(x+3)+2(x-1)][3(x+3)-2(x-1)]=0
(5x+7)((x+11)=0
所以x=-7/5或-11