Question

Разложи на множители:
um3+uy3−ym3−y4.

Answer 1

$um^{3}+uy^{3} - ym^{3}-y^{4} = m^{3}(u-y) + y^{3}(u-y)=(u-y)(m^{3}+y^{3})=\\(u-y)(m+y)(m^{2}-my+y^{2})$