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6mx2+4nxy+2x+2xy-x2+y-4不含x2和xy项,求6m-2n+2的值
人气:376 ℃ 时间:2020-05-10 14:26:50
解答
(6m-1)x^2+(4n+2)xy+2x+y-4
6m-1=0,4n+2=0
m=1/6,n=-1/2
6m-2n+2=1+1+2=4
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