9(3X-1)^2-16(2X+1)^2=0[3(3x-1)]^2-[4(2x+1)]^2=0[3(3x-1)+4(2x+1)][3(3x-1)-4(2x+1)]=0(17x+1)(x-7)=0x=-1/17或7注:^2表示平方
x=-7或x=1/17