【(x²-4/x²-4x+4)+(2-x/x+2)】÷(x/x-2)等于多少?
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【(x²-4/x²-4x+4)+(2-x/x+2)】÷(x/x-2)等于多少?
【(x²-4/x²-4x+4)+(2-x/x+2)】÷(x/x-2)等于多少?
【(x²-4/x²-4x+4)+(2-x/x+2)】÷(x/x-2)等于多少?
【(x²-4/x²-4x+4)+(2-x/x+2)】÷(x/x-2)
=[(x+2)(x-2)/(x-2)^2+(2-x)/(x+2)]÷(x/x-2)
=[(x+2)/(x-2)+(2-x)/(x+2)]÷(x/x-2)
=[(x^2+4x+4-x^2+4x-4)/(x-2)(x+2)]÷(x/x-2)
=[8x/(x-2)(x+2)]x[(x-2)/x]
=8/(x+2)
这题主要是先化简,通分约去X-2,这样通过几次约就会得到答案了,你试一下吧