已知:a加b等于2分之3,ab等于1,化简(a-2)(b-2)的结果是?
已知:a加b等于2分之3,ab等于1,化简(a-2)(b-2)的结果是?
数学人气:143 ℃时间:2020-03-27 02:36:02
优质解答
(a-2)(b-2)=ab-2a-2b+4=1-2(a+b)+4=1-2*1.5+4=2
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