通分:(1)1/3xy方,3/2xy一y方,2/6x一3y；(2)x一1/6一2x，6/x方一9
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解决时间 2021-02-04 20:21
- 提问者网友：眉目添风霜
- 2021-02-04 05:32
通分:(1)1/3xy方,3/2xy一y方,2/6x一3y；(2)x一1/6一2x，6/x方一9
最佳答案
- 五星知识达人网友：猎心人
- 2021-02-04 06:02
(1)
1/3xy
=2(2x-y)/6xy(2x-y),
3/2xy-y²
=3/y(2x-y)
=18x/6xy(2x-y),
2/6x-3y
=2/3(2x-y)
=4xy/6xy(2x-y).
(2)
x-1/6-2x
=(1-x)/2(x-3)
=(1-x)(x+3)²/2(x-3)(x+3)²,
6/x²-9
=6/(x+3)(x-3)
=12(x+3)/2(x-3)(x+3)²,
x/x²+6x+9
=x/(x+3)²
=2x(x-3)/2(x-3)(x+3)².追问你确定对吗?
1/3xy
=2(2x-y)/6xy(2x-y),
3/2xy-y²
=3/y(2x-y)
=18x/6xy(2x-y),
2/6x-3y
=2/3(2x-y)
=4xy/6xy(2x-y).
(2)
x-1/6-2x
=(1-x)/2(x-3)
=(1-x)(x+3)²/2(x-3)(x+3)²,
6/x²-9
=6/(x+3)(x-3)
=12(x+3)/2(x-3)(x+3)²,
x/x²+6x+9
=x/(x+3)²
=2x(x-3)/2(x-3)(x+3)².追问你确定对吗?
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