6mx的平方+4nxy+2x+2xy-x的平方+y-4中不含2次方,求6m-2n+2的值?
问题描述:
6mx的平方+4nxy+2x+2xy-x的平方+y-4中不含2次方,求6m-2n+2的值?
答
原式=(6m-1)x^2+(4n+2)xy+2x+y-4
6m-1=0
6m=1
4n+2=0
4n=-2
2n=-1
6m-2n+2=1+1+2=4