若多项式3x^2-2(5+y-2x^2)+mx^2的值与x的值无关,则m等于

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若多项式3x^2-2(5+y-2x^2)+mx^2的值与x的值无关,则m等于若多项式3x^2-2(5+y-2x^2)+mx^2的值与x的值无关,则m等于若多项式3x^2-2(5+y-2x^2)+mx^

若多项式3x^2-2(5+y-2x^2)+mx^2的值与x的值无关,则m等于
若多项式3x^2-2(5+y-2x^2)+mx^2的值与x的值无关,则m等于

若多项式3x^2-2(5+y-2x^2)+mx^2的值与x的值无关,则m等于
3x^2-2(5+y-2x^2)+mx^2
=(m+7)x^2-10-2y
值与x的值无关
所以m+7=0
m=-7

3x^2-2(5+y-2x^2)+mx^2=(3+4+m)x^2-2y-10
3+4+m=0
m=-7