题目内容
化简:
(1)
+
+1
(2)
÷(y+2-
).
(1)
| a |
| a-b |
| b |
| b-a |
(2)
| y-3 |
| 4y-8 |
| 5 |
| y-2 |
(1)原式=
=
=2;
(2)原式=
÷
=
•
=
.
| a-b+a-b |
| a-b |
| 2(a-b) |
| a-b |
(2)原式=
| y-3 |
| 4(y-2) |
| (y+2)(y-2)-5 |
| y-2 |
| y-3 |
| 4(y-2) |
| y-2 |
| (y+3)(y-3) |
| 1 |
| 4y+12 |
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