3 years ago

Find the sum and choose the correct answer.

Mathematics

2 answers:

MrRa [10]3 years ago

8 0

Hi

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

n³ + 4n² - 8n - 9

Answer: n³ + 4n² - 8n - 9

Vaselesa [24]3 years ago

7 0

Answer:

Correct answer is:

n³+4n²-8n-9

Step-by-step explanation:

We have to find the sum of:

2n³ + 4n² - 7 and -n³ - 8n - 2

On adding both terms:

2n³ + 4n² - 7 + (-n³ - 8n - 2)

= 2n³ - n³ + 4n² - 8n - 7 - 2

= n³+4n²-8n-9

Hence, sum of 2n³ + 4n² - 7 and -n³ - 8n - 2 is:

n³+4n²-8n-9

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