Question

Find the sum and choose the correct answer.2n 3 + 4n 2 - 7 and -n 3 + 8n - 9

Answer 1

n​3​​+4n​2​​+8n−16
hope helped

Answer 2

The correct answer for the sum is : n^{3} + 4n^{2} + 8n -16

Explanation:

We start by adding each n term, n3 with n3 and the same with n2, n and then numbers

`(2n^(3) + 4n^(2) -7 ) +  ( -n^(3) + 8n -9)`

(2-1)n^{3}

(4+0)n^{2}

(8+0)n

(-7-9)

`n^(3) + 4n^(2) + 8n -16`