问题
解答题
(x+1)(x+3)=6x+4.
答案
(x+1)(x+3)=6x+4,
x2+4x+3=6x+4,
x2-2x=1,
x2-2x+1=1+1,
(x-1)2=2,
x-1=±
,2
x=1±
,2
x1=1+
,x2=1-2
.2
(x+1)(x+3)=6x+4.
(x+1)(x+3)=6x+4,
x2+4x+3=6x+4,
x2-2x=1,
x2-2x+1=1+1,
(x-1)2=2,
x-1=±
,2
x=1±
,2
x1=1+
,x2=1-2
.2