9(x+3)^2=4(x+2)^29(x+3)^2-4(x+2)^2=0[3(x+3)+2(x+2)]*[3(x+3)-2(x+2)]=0[3x+9+2x+4]*[3x+9-2x-4]=0(5x+13)*(x+5)=0则 x=-5 或者x=-13/5
9(x+3)2=4(x+2)2(3x+9+2x+4)(3x+9-2x-4)=0(5x+13)(x+5)=0x=-13/5 x=-5
