Question

Find the sum and express it in simplest form (-n^3-8n-6)+(-8n^3+9n) (giving 20 pts)

Answer 1

- 9n³ + n - 6

Explanation:

(- n³ - 8n - 6) + (- 8n³ + 9n)

since both parenthesis are being distributed by 1 , remove the parenthesis

= - n³ - 8n - 6 - 8n³ + 9n ← collect like terms

= (- n³ - 8n³) + (- 8n + 9n) - 6

= - 9n³ + n - 6