问题
解答题
解方程(x-1)(x-3)=5.
答案
(x-1)(x-3)=5,
x2-4x+3=5,
x2-4x=2,
x2-4x+4=2+4,
(x-2)2=6,
x-2=±
,6
x1=2+
,x2=2-6
.6
解方程(x-1)(x-3)=5.
(x-1)(x-3)=5,
x2-4x+3=5,
x2-4x=2,
x2-4x+4=2+4,
(x-2)2=6,
x-2=±
,6
x1=2+
,x2=2-6
.6