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根号50+根号32除以根号8-4
人气:486 ℃ 时间:2020-01-28 01:05:40
解答
(√50+√32)/(√8-4)
=(5√2+4√2)(2√2+4)/(8-16)
=9√2×(2√2+4)/(-8)
=(36+36√2)/(-8)
=-9(√2+1)/2
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