计算:(a²-4/a²-4a+4-2/a-2)÷a²+2a/a-2;(x²-1/x²-2x+1+1-x/x+1)÷x/x-1.
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![计算:(a²-4/a²-4a+4-2/a-2)÷a²+2a/a-2;(x²-1/x²-2x+1+1-x/x+1)÷x/x-1.](/uploads/image/z/759502-46-2.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9A%EF%BC%88a%26%23178%3B-4%2Fa%26%23178%3B-4a%2B4-2%2Fa-2%EF%BC%89%C3%B7a%26%23178%3B%2B2a%2Fa-2%3B%28x%26%23178%3B-1%2Fx%26%23178%3B-2x%2B1%2B1-x%2Fx%2B1%29%C3%B7x%2Fx-1.)
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计算:(a²-4/a²-4a+4-2/a-2)÷a²+2a/a-2;(x²-1/x²-2x+1+1-x/x+1)÷x/x-1.
计算:(a²-4/a²-4a+4-2/a-2)÷a²+2a/a-2;(x²-1/x²-2x+1+1-x/x+1)÷x/x-1.
计算:(a²-4/a²-4a+4-2/a-2)÷a²+2a/a-2;(x²-1/x²-2x+1+1-x/x+1)÷x/x-1.
1、原式=[(a+2)/(a-2)-2/(a-2)]÷(a²+2a)/(a-2)=a/(a-2)*(a-2)/(a²+2a)=1/(a+2)
2、原式=[(x+1)/(x-1)+(1-x)/(x+1)]÷x/(x-1)=4x/(x^2-1)÷x/(x-1)=4/(x+1)