若多项式3x²-2(5+y-2x²)+mx²的值与x的值无关,则m等于多少
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![若多项式3x²-2(5+y-2x²)+mx²的值与x的值无关,则m等于多少](/uploads/image/z/696040-16-0.jpg?t=%E8%8B%A5%E5%A4%9A%E9%A1%B9%E5%BC%8F3x%26%23178%3B-2%EF%BC%885%2By-2x%26%23178%3B%EF%BC%89%2Bmx%26%23178%3B%E7%9A%84%E5%80%BC%E4%B8%8Ex%E7%9A%84%E5%80%BC%E6%97%A0%E5%85%B3%2C%E5%88%99m%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91)
若多项式3x²-2(5+y-2x²)+mx²的值与x的值无关,则m等于多少
若多项式3x²-2(5+y-2x²)+mx²的值与x的值无关,则m等于多少
若多项式3x²-2(5+y-2x²)+mx²的值与x的值无关,则m等于多少
3x²-2(5+y-2x²)+mx²
=3x²-10-2y+4x²+mx²
=(3+4+m)x²-2y-10
若要使其值与x无关,则使3+4+m=0即m=-7即可.