题目内容
解方程:(1)(x-1)2=3x-3 (2)2x2-2x-3=0
(1)(x-1)2=3x-3
(x-1)2-3x+3=0
(x-1)2-3(x-1)=0
(x-1)(x-4)=0
x1=1,x2=4;
(2)2x2-2x-3=0
∵a=2,b=-2,c=-3
∴x=
=
=
.
(x-1)2-3x+3=0
(x-1)2-3(x-1)=0
(x-1)(x-4)=0
x1=1,x2=4;
(2)2x2-2x-3=0
∵a=2,b=-2,c=-3
∴x=
-b±
| ||
| 2a |
=
2±
| ||
| 4 |
=
1±
| ||
| 2 |
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