Question

Разложи на множители d^3−d^2z−dz^2+z^3

Answer 1

$d^3-d^2z-dz^2+z^3=d^2\, (d-z)-z^2(d-z)=(d-z)(d\, ^2-z^2)=\\\\=(d-z)(d-z)(d+z)=(d-z)^2\, (d+z)$