1.x=1/4.x=-7/52.(2x+3)^2-4(2x+3)=0 (2x+3)(2x+3-4)=0x=-3/2 x=1/23.(x-2)^2-(2x+3)^2=0 (x-2-2x-3)(x-2+2x+3)=0x=-5; x=-1/342x+6=(x+3)平方 2(x+3)-(x+3)^2=0(x+3)(2-x-3)=0x=-3 x=-1