已知：（a－3b）的二次方+√3a--b--4=0,求a+b的值.
人气：383 ℃ 时间：2020-05-11 16:03:51
解答
（a－3b）=0,3a-b-4=0 a=3/2,b=1/2 a+b=3/2+1/2=2
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