题目内容
计算:
(1)
•(
)2÷
;
(2)
+
.
(1)
| 2m |
| 3n |
| 3n |
| p |
| mn |
| p2 |
(2)
| x2+4 |
| x-2 |
| 4x |
| 2-x |
(1)原式=
×
×
=6;
(2)原式=
-
=
=x-2.
| 2m |
| 3n |
| 9n2 |
| p2 |
| p2 |
| mn |
=6;
(2)原式=
| x2+4 |
| x-2 |
| 4x |
| x-2 |
=
| (x-2)2 |
| x-2 |
=x-2.
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