已知m=2x²+4xy-2x-3,n=-x²+xy+2,且3m+6N的值与x无关,求y的值,我着急交作业,要不
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![已知m=2x²+4xy-2x-3,n=-x²+xy+2,且3m+6N的值与x无关,求y的值,我着急交作业,要不](/uploads/image/z/2699710-70-0.jpg?t=%E5%B7%B2%E7%9F%A5m%3D2x%26sup2%3B%2B4xy-2x-3%2Cn%3D-x%26sup2%3B%2Bxy%2B2%2C%E4%B8%943m%2B6N%E7%9A%84%E5%80%BC%E4%B8%8Ex%E6%97%A0%E5%85%B3%2C%E6%B1%82y%E7%9A%84%E5%80%BC%2C%E6%88%91%E7%9D%80%E6%80%A5%E4%BA%A4%E4%BD%9C%E4%B8%9A%2C%E8%A6%81%E4%B8%8D)
已知m=2x²+4xy-2x-3,n=-x²+xy+2,且3m+6N的值与x无关,求y的值,我着急交作业,要不
已知m=2x²+4xy-2x-3,n=-x²+xy+2,且3m+6N的值与x无关,求y的值,我着急交作业,要不
已知m=2x²+4xy-2x-3,n=-x²+xy+2,且3m+6N的值与x无关,求y的值,我着急交作业,要不
3m + 6n
= 3(m + 2n)
= 3(2x² + 4xy - 2x - 3 -2x² + 2xy + 4)
= 3(6xy - 2x + 1)
= 6x(3y -1) + 3
因为值与x无关
所以3y - 1 = 0
y = 1/3