Question

Find the sum and choose the correct answer.

2n 3 + 4n 2 - 7 and -n 3 - 8n - 2

Answer 1

n³ + 4n² - 8n - 9

Explanation:

(2n³ + 4n² - 7) + (-n³ - 8n - 2)

2n³ + 4n² - 7 - n³ - 8n - 2

2n³ - n³ + 4n²- 8n - 7 - 2

n³ + 4n² - 8n - 9