怎么化简:(a^(1/2)+b^(1/2))(a^(1/2)-b^(-1/2))(a+b).
1个回答
:(a^(1/2)+b^(1/2))(a^(1/2)-b^(-1/2))(a+b).
=(a-b)(a+b)
a^2-b^2
全是平方差公式嘛
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