Question

Find the sum and choose the correct answer.

Answer 1

Hi

2n³ + 4n² - 7 + (-n³ - 8n - 2) = 2n³ - n³ + 4n² - 8n - 7 - 2 

n³ + 4n² - 8n - 9

Answer: n³ + 4n² - 8n - 9

Answer 2

Answer:

Correct answer is:

n³+4n²-8n-9

Step-by-step explanation:

We have to find the sum of:

2n³ + 4n² - 7  and  -n³ - 8n - 2

On adding both terms:

2n³ + 4n² - 7 + (-n³ - 8n - 2)

= 2n³ - n³ + 4n² - 8n - 7 - 2

= n³+4n²-8n-9

Hence, sum of 2n³ + 4n² - 7  and  -n³ - 8n - 2 is:

n³+4n²-8n-9