2x方-4x立方-1除以2x+(x-1)等于多少

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2x方-4x立方-1除以2x+(x-1)等于多少

2x方-4x立方-1除以2x+(x-1)等于多少
2x方-4x立方-1除以2x+(x-1)等于多少

2x方-4x立方-1除以2x+(x-1)等于多少
={[(x+1)(x-1)-3]/(x-1)}÷[x(x²-4)/(x-1)²]
=[(x²-4)/(x-1)]×[(x-1)²/x(x²-4)]
=(x-1)/x