(p+q)^3 = tolong d jawab

(p+q) × (p+q) = p^2 + pq + pq + q^2
= p^2 + 2pq + q^2

(p^2 + 2pq + q^2) × (p+q)
= p^3 + p^2q + 2p^2q + 2pq^2 + pq^2 + q^3
= p^3 + 3p^2q + 3pq^2 + q^3