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计算:(1)x2+1x2−1−x−2x−1÷x−2x;(2)(3xy-2)2÷(-2x-1y).
题目详情
计算:
(1)
−
÷
;
(2)(3xy-2)2÷(-2x-1y).
(1)
x2+1 |
x2−1 |
x−2 |
x−1 |
x−2 |
x |
(2)(3xy-2)2÷(-2x-1y).
▼优质解答
答案和解析
(1)
−
÷
=
−
•
=-
,
(2)(3xy-2)2÷(-2x-1y)=
=-
.
x2+1 |
x2−1 |
x−2 |
x−1 |
x−2 |
x |
x2+1 |
(x+1)(x−1) |
x−2 |
x−1 |
x |
x−2 |
1 |
x+1 |
(2)(3xy-2)2÷(-2x-1y)=
9 x2y−4 |
−2 x−1y |
9 x3 |
2 y5 |
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