计算:(x^2-4x+4/x^2-4-x/x+2)÷x-1/x+2.
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计算:(x^2-4x+4/x^2-4-x/x+2)÷x-1/x+2.计算:(x^2-4x+4/x^2-4-x/x+2)÷x-1/x+2.计算:(x^2-4x+4/x^2-4-x/x+2)÷x-1/x+
计算:(x^2-4x+4/x^2-4-x/x+2)÷x-1/x+2.
计算:(x^2-4x+4/x^2-4-x/x+2)÷x-1/x+2.
计算:(x^2-4x+4/x^2-4-x/x+2)÷x-1/x+2.
原式=[(x-2)^2/(x+2)(x-2) -x/(x+2)] ×(x+2)/(x-1)
=[(x-2)/(x+2) -x/(x+2)] ×(x+2)/(x-1)
=[(-2)/(x+2)] ×(x+2)/(x-1)
=-2/(x-1)
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