(a/a-2b)×√(a^2-4ab^2+4b^2/a)化简
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(a/a-2b)×√(a^2-4ab^2+4b^2/a)化简
a/(a-2b)×√[(a^2-4ab^2+4b^2)/a]
=a/(a-2b)×√[(a-2b)^2/a]
=√a*|a-2b|/(a-2b)
=√a (a>2b),0 (a=2b),-√a (a
=a/(a-2b)×√[(a-2b)^2/a]
=√a*|a-2b|/(a-2b)
=√a (a>2b),0 (a=2b),-√a (a
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