若m+n=0,则多项式m^3;-m^2n-mn^2+n^3=_____
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若m+n=0,则多项式m^3;-m^2n-mn^2+n^3=_____若m+n=0,则多项式m^3;-m^2n-mn^2+n^3=_____若m+n=0,则多项式m^3;-m^2n-mn^2+n^3=
若m+n=0,则多项式m^3;-m^2n-mn^2+n^3=_____
若m+n=0,则多项式m^3;-m^2n-mn^2+n^3=_____
若m+n=0,则多项式m^3;-m^2n-mn^2+n^3=_____
m^3-m^2n-mn^2+n^3
=m^2(m-n)-n^2(m-n)
=(m-n)(m^2-n^2)
=(m-n)(m-n)(m+n)
=(m-n)²(m+n)
=(m-n)²×0
=0
若m+n=0,则多项式m^3-m^3n-mn^2+n^3
若m+n=0,则多项式m^3;-m^2n-mn^2+n^3=_____
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