题目内容
计算
-
=______.
3 |
2a-4 |
4 |
a2-4 |
原式=
-
=
=
.
故答案为:
.
3 |
2(a-2) |
4 |
(a+2)(a-2) |
=
3(a+2)-8 |
2(a+2)(a-2) |
=
3a-2 |
2(a+2)(a-2) |
故答案为:
3a-2 |
2(a+2)(a-2) |
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