(2x+1)^2=-6x-3求大神
问题描述:
(2x+1)^2=-6x-3求大神
答
(2x+1)^2=-6x-3
4x^2+4x+1=-6x-3
4x^2+10x+4=0
(4x+2)(x+2)=0
x=-1/2或x=-2