Find the sum and choose the correct answer. 2n 3 + 4n 2 - 7 and -n 3 + 8n - 9
Mathematics · High School · Tue Nov 03 2020
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Given the numerical equations:
2n^3 + 4n^2 - 7 and -n ^3 + 8n - 9
Find their sums.
Solution:
In order to find the sum of the two numerical equations, we will equate them in one solution separated by a plus sign, which denotes the operation of addition.
= (2n^3 + 4n^2 - 7) + (-n ^3 + 8n - 9)
= 2n^3 + 4n^2 - 7 - n ^3 + 8n - 9
Combine similar terms, this means terms with the same degree or constants.
= n^3 + 4n^2 + 8n - 16
Final answer: n^3 + 4n^2 + 8n - 16