a^2+b^2=6
(a-b)^2=4=a^2+b^2-2ab=6-2ab
所以ab=1
a的平方加b的平方等于6,a减b等于2、ab的值是多少?
a的平方加b的平方等于6,a减b等于2、ab的值是多少?
数学人气:696 ℃时间:2019-08-21 23:45:37
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