题目内容
化简
+
的结果是______
12 |
x2-9 |
2 |
x+3 |
原式=
=
=
=
.
故答案为
.
12+2(x-3) |
(x+3)(x-3) |
2x+6 |
(x+3)(x-3) |
2(x+3) |
(x+3)(x-3) |
2 |
x-3 |
故答案为
2 |
x-3 |
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题目内容
12 |
x2-9 |
2 |
x+3 |
12+2(x-3) |
(x+3)(x-3) |
2x+6 |
(x+3)(x-3) |
2(x+3) |
(x+3)(x-3) |
2 |
x-3 |
2 |
x-3 |