题目内容
(1)计算:(-1)2+sin230°+(
)0-(
)-1;
(2)化简:
÷
.
| 2 |
| 1 |
| 2 |
(2)化简:
| 3x-6 |
| x2-4 |
| x+2 |
| x2+4x+4 |
(1)原式=1+
+1-2=
;
(2)原式=
÷
=
•(x+2)=3.
| 1 |
| 4 |
| 1 |
| 4 |
(2)原式=
| 3(x-2) |
| (x+2)(x-2) |
| x+2 |
| (x+2)2 |
=
| 3 |
| x+2 |
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