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11 March, 13:38

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

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Answers (2)
  1. 11 March, 13:42
    0
    n3 + 4 n2 + 8 n - 16

    Step-by-step explanation:

    you just have to combine like terms. give me a brainliest?
  2. 11 March, 14:02
    0
    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
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