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Find the sum and choose the correct answer.

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

n3 + 4 n2 - 8 n - 9
n3 - 4 n2 -9
- n3 + 4 n2 - 8 n - 9
n3 + 4 n2 - 8 n - 5

Respuesta :

devishri1977

Answer:

Step-by-step explanation:

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

=2n³ - n³ + 4n² - 7 -2 - 8n

= n³ + 4n²  - 8n - 9

abbyw57

Answer:

n3 + 4 n2 + 8 n - 16

Step-by-step explanation:

you just have to combine like terms. give me a brainliest?

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