化简求值x2-4x+4/x2-1÷(3/x+1-1),其中x=-2

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化简求值x2-4x+4/x2-1÷(3/x+1-1),其中x=-2

化简求值x2-4x+4/x2-1÷(3/x+1-1),其中x=-2
化简求值x2-4x+4/x2-1÷(3/x+1-1),其中x=-2

化简求值x2-4x+4/x2-1÷(3/x+1-1),其中x=-2
(x²-4x+4)/(x²-1)÷[3/(x+1)-1],其中x=-2
=(x-2)²/(x-1)(x+1)÷(3-x-1)/(x+1)
=(x-2)²/(x-1)(x+1)÷[-(x-2)/(x+1)]
=-(x+2)/(x-1)
=-(-2+2)/(-2-1)
=0/(-3)
=0