解
9(4x-3)²=4(x+3)²
9(4x-3)²-4(x+3)²=0
[3(4x-3)-2(x+3)][3(4x-3)+2(x+3)]=0
(12x-9-2x-6)(12x-9+2x+6)=0
(10x-15)(14x-3)=0
∴x=3/2
或x=3/14