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(4b+3a-5c)(3a-4b+5c)=?
人气:165 ℃ 时间:2019-10-08 17:01:11
解答
(4b+3a-5c)(3a-4b+5c)
=(3a)²-(4b-5c)²
=9a²-16b²-25c²+40bc
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3a=4b=5c,a:c=():()
(3a+4b-5c)²
若3A=4B=5C那么A:B:C=_.
若3A=4B=5C那么A:B:C=_.
若3A=4B=5C那么A:B:C=_.
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