题目内容
(1)计算:3
-9
+3
(2)解方程:(2x-1)2=x2+2x+1.
| 48 |
|
| 12 |
(2)解方程:(2x-1)2=x2+2x+1.
(1)原式=12
-3
+6
=15
;
(2)(2x-1)2=x2+2x+1,
(2x-1)2=(x+1)2,
则2x-1=x+1,2x-1=-(x+1),
解得x1=2,x2=0.
| 3 |
| 3 |
| 3 |
=15
| 3 |
(2)(2x-1)2=x2+2x+1,
(2x-1)2=(x+1)2,
则2x-1=x+1,2x-1=-(x+1),
解得x1=2,x2=0.
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