若m-2n=4,则4n-2m=,(m-2n)^2-2n+m+5=
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若m-2n=4,则4n-2m=,(m-2n)^2-2n+m+5=若m-2n=4,则4n-2m=,(m-2n)^2-2n+m+5=若m-2n=4,则4n-2m=,(m-2n)^2-2n+m+5=4n-2
若m-2n=4,则4n-2m=,(m-2n)^2-2n+m+5=
若m-2n=4,则4n-2m=,(m-2n)^2-2n+m+5=
若m-2n=4,则4n-2m=,(m-2n)^2-2n+m+5=
4n-2m
=2(2n-m)
=-2(m-2n)
=-2x4
=-8
(m-2n)^2-2n+m+5
=(m-2n)^2+(m-2n)+5
=4^2+4+5
=16+4+5
=25
4n-2m=-2(m-2n)=-2×4=-8
,(m-2n)^2-2n+m+5=(m-2n)²+(m-2n)+5=16+4+5=25
已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2=
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