Answer: Explanation: n(n – 1)(n + 1) + 6n = n^3 + 5nn(n^2 – 1) + 6n = n^3 + 5nn^3 – n + 6n = n^3 + 5nn^3 + 5n = n^3 + 5n (proven) Log in to Reply

Answer:

Explanation:

n(n – 1)(n + 1) + 6n = n^3 + 5n

n(n^2 – 1) + 6n = n^3 + 5n

n^3 – n + 6n = n^3 + 5n

n^3 + 5n = n^3 + 5n (proven)