9（2x+3)^2=4（2x+5）^2 [3(2x+3)-2(2x+5)][3(2x+3)+2(2x+5)]=0 [(6x+9)-(4x+10)][(6x+9)+(4x+10)]=0 (2x-1)(10x+19)=0 x1=1/2,x2=-19/10
采纳哦