题目内容
把下列各式化成最简二次根式:
(1)
;
(2)-
.
(1)
| 27 |
| 5 |
|
(2)-
| abc |
| 2 |
|
(1)原式=
=
×
×
=9
=3
;
(2)原式=-
×
×
=-
.
| 27 |
| 5 |
|
| 27 |
| 5 |
| 5 |
| 3 |
|
|
| 3 |
(2)原式=-
| abc |
| 2 |
| |c| |
| a2 |
|
| c2 |
| 4a |
| 2bc |
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