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计算:【(3√2)-(2√5)】的立方×【(3√2)+(2√5)】的立方
人气:331 ℃ 时间:2019-08-21 22:31:01
解答
【(3√2)-(2√5)】³×【(3√2)+(2√5)】³
={[(3√2)-(2√5)][(3√2)+(2√5)]}³
=[(3√2)²-(2√5)²]³
=(18-20)³
=(-2)³
=-8
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