(2x+1)²=3(2x+1) (2x+1)²-3(2x+1)=0(2x+1)(2x+1-3)=0(2x+1)(2x-2)=0x=-1/2,x=1(3x+5）²-5（3x+5）+4=0(3x+5-1)(3x+5-4)=0(3x+4)(3x+1)=0x=-4/3,x=-1/3