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18 February, 12:56

Find the sum and choose the correct answer.

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

-n3 + 4n2 - 8n - 9

n3 + 4n2 - 8n - 9

n3 + 4n2 - 8n - 5

n3 - 4n2 - 9

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  1. 18 February, 13:21
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    Hi

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

    n³ + 4n² - 8n - 9

    Answer: n³ + 4n² - 8n - 9
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