题目内容
把根号外的因式移到根号内:
(1)-5
(2)(1-x)
.
(1)-5
|
(2)(1-x)
|
(1)原式=-5×
=-5×
=-
;
(2)原式=(1-x)•
=(1-x)•
=-
.
|
=-5×
| ||
| 5 |
=-
| 5 |
(2)原式=(1-x)•
|
=(1-x)•
| ||
| x-1 |
=-
| x-1 |
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| 5 |
| 5 |
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