If M is a positive integer, the degree of multiplication of m power of polynomial 2x by y plus m + 2 power of 2Y minus m + 3 power of 3 is ()A m+3 B m+2 C m+1 D m

It should be m + 2, B
Because the degree of a polynomial is the degree of its highest term, it's easy to choose a, because m + 3 of 3 is a constant term, so it can't, only m + 2 of 2Y is OK

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