化简(X方-2X分之X+2.化简(X方-2X分之X+2-X方-4X+4分之X-1)除以X分之X-4,其中,X=负2分之5
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![化简(X方-2X分之X+2.化简(X方-2X分之X+2-X方-4X+4分之X-1)除以X分之X-4,其中,X=负2分之5](/uploads/image/z/1107627-51-7.jpg?t=%E5%8C%96%E7%AE%80%EF%BC%88X%E6%96%B9-2X%E5%88%86%E4%B9%8BX%2B2.%E5%8C%96%E7%AE%80%EF%BC%88X%E6%96%B9-2X%E5%88%86%E4%B9%8BX%2B2-X%E6%96%B9-4X%2B4%E5%88%86%E4%B9%8BX-1%EF%BC%89%E9%99%A4%E4%BB%A5X%E5%88%86%E4%B9%8BX-4%2C%E5%85%B6%E4%B8%AD%2CX%3D%E8%B4%9F2%E5%88%86%E4%B9%8B5)
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化简(X方-2X分之X+2.化简(X方-2X分之X+2-X方-4X+4分之X-1)除以X分之X-4,其中,X=负2分之5
化简(X方-2X分之X+2.
化简(X方-2X分之X+2-X方-4X+4分之X-1)除以X分之X-4,其中,
X=负2分之5
化简(X方-2X分之X+2.化简(X方-2X分之X+2-X方-4X+4分之X-1)除以X分之X-4,其中,X=负2分之5
[(x+2)/(x^2-2x)-(x-1)/(x^2-4x+4)]/[(x-4)/x]
=[(x+2)/x(x-2)-(x-1)/(x-2)^2]*[x/(x-4)]
={[(x+2)(x-2)-x(x-1)]/x(x-2)^2}*[x/(x-4)]
=[(x^2-4-x^2+x)/x(x-2)^2*[x/(x-4)]
=(x-4)*x/[x(x-2)^2(x-4)]
=1/(x-2)^2
=1/(-5/2-2)^2
=1/(81/4)
=4/81
看不懂
你的方是平方还是立方还是X次方
[(x+2)/(x^2-2x)-(x-1)/(x^2-4x+4)]÷(x-4)/x
=[(x+2)/x(x-2)-(x-1)/(x-2)^2]*x/(x-4)
=[(x+2)(x-2)-x(x-1)]/x(x-2)^2*x/(x-4)
=(x^2-4-x^2+x)/(x-2)^2(x-4)
=(x-4)/(x-2)^2(x-4)
=1/(x-2)^2
=1/(-5/2-2)^2
=1/(-9/2)^2
=4/81
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