Question

factorize. p³ + q³ + r³ -3pqr

Answer 1

${p}^{3} + {q}^{3} + {r}^{3} - 3pqr \: = (p + q + r)( {p}^{2} + {q}^{2} + {r}^{2} - pq - pr - qr)$