题目内容
选择合适的方法解下列方程:
(1)2x2-3x=2
(2)(x-1)2+2x(x-1)=0.
(1)2x2-3x=2
(2)(x-1)2+2x(x-1)=0.
(1)2x2-3x=2
2x2-3x-2=0
(x-2)(2x+1)=0,
解得:x1=2,x2=-
;
(2)(x-1)2+2x(x-1)=0
(x-1)[(x-1)+2x]=0
(x-1)(3x-1)=0,
解得:x1=1,x2=
.
2x2-3x-2=0
(x-2)(2x+1)=0,
解得:x1=2,x2=-
1 |
2 |
(2)(x-1)2+2x(x-1)=0
(x-1)[(x-1)+2x]=0
(x-1)(3x-1)=0,
解得:x1=1,x2=
1 |
3 |
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