化简(1 - 1/a-1)÷a²-4a+4/a²-a

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化简(1 - 1/a-1)÷a²-4a+4/a²-a

化简(1 - 1/a-1)÷a²-4a+4/a²-a
化简(1 - 1/a-1)÷a²-4a+4/a²-a

化简(1 - 1/a-1)÷a²-4a+4/a²-a
1-1/(a-1)÷(a-2)^2/a(a-1)
=a-1-1/(a-1)÷(a-2)^2/a(a-1)
=a/(a-1)÷(a-2)^2/a(a-1)
=a^2/(a-2)^2