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

Answer:

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

Step-by-step 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)

$n^{3} + 4n^{2} + 8n -16$