计算:a/b(a-b)-b/a(a-b);(1/a+1/b)÷a²+2ab+b²/a+b.

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计算:a/b(a-b)-b/a(a-b);(1/a+1/b)÷a²+2ab+b²/a+b.

计算:a/b(a-b)-b/a(a-b);(1/a+1/b)÷a²+2ab+b²/a+b.
计算:a/b(a-b)-b/a(a-b);(1/a+1/b)÷a²+2ab+b²/a+b.

计算:a/b(a-b)-b/a(a-b);(1/a+1/b)÷a²+2ab+b²/a+b.
a/b(a-b)-b/a(a-b);
=[a²(a-b)-b²(a-b)]/ab(a-b)
=(a-b)²(a+b)/ab(a-b)
=(a²-b²)/ab
(1/a+1/b)÷a²+2ab+b²/a+b.
=(a+b)ab × (a+b)/(a+b)²
=ab