若x^my·4y^n-(2x)²y^4=0,则m+n=?

若x^my·4y^n-(2x)²y^4=0,则m+n=?
若x^my·4y^n-(2x)²y^4=0,则m+n=?

若x^my·4y^n-(2x)²y^4=0,则m+n=?
x^my·4y^n-(2x)²y^4=0
m=2
n=4

m+n=6

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