题目内容
计算:
(1)(
)2
(2)(-2
)2
(3)(
)2
(4)
(5)
-(
)2
(6)
.
(1)(
| 7 |
(2)(-2
| 7 |
(3)(
| ||
| 2 |
(4)
| 10-2 |
(5)
| (-17)2 |
| 13 |
(6)
| 132-52 |
分析:根据二次根式的乘法和二次根式的性质分别进行计算,即可得出答案.
解答:解:(1)(
)2=7;
(2)(-2
)2=28;
(3)(
)2=
(4)
=
=
;
(5)
-(
)2=17-13=4;
(6)
=
=
=12.
| 7 |
(2)(-2
| 7 |
(3)(
| ||
| 2 |
| 5 |
| 4 |
(4)
| 10-2 |
|
| 1 |
| 10 |
(5)
| (-17)2 |
| 13 |
(6)
| 132-52 |
| 169-25 |
| 144 |
点评:此题考查了二次根式的乘法和二次根式的性质,掌握二次根式的乘法法则是本题的关键,比较简单,做题时要认真.
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