Question

Multiply (p-q) (p²+pq+q²)

Answer 1

$\\ \sf\longmapsto (p-q)(p^2+pq+q^2$

$\\ \sf\longmapsto p(p^2+pq+q^2)-q(p^2+pq+q^2)$

$\\ \sf\longmapsto p^3+p^2q+pq^2-p^2q-pq^2-q^3$

$\\ \sf\longmapsto p^3-q^3$