这道数学题求解啊
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[(x-2)²/(x+2)(x-2)-x/(x+2)]÷[(x-1)/(x+2)]
=[(x-2)/(x+2)-x/(x+2)]÷[(x-1)/(x+2)]
=[(-2)/(x+2)]÷[(x-1)/(x+2)]
=[(-2)/(x+2)]*[(x+2)/(x-1)]
=(-2)/(x-1)
=-2/(x-1)
=[(x-2)/(x+2)-x/(x+2)]÷[(x-1)/(x+2)]
=[(-2)/(x+2)]÷[(x-1)/(x+2)]
=[(-2)/(x+2)]*[(x+2)/(x-1)]
=(-2)/(x-1)
=-2/(x-1)
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解:原式=(X-2)²/(X-2)(X+2)/(X-1)/(X+2)=-2/(X+2)/(X-1)/(X+2)=-2/(X-1)。
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2015-01-21
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设未知数,得0
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