How much greater is (20x^7 - 10x^6 - 9x^5 - 14x^4 + 18x) + (-6x^6 - 12x^5 - 9x^4 - 9x)?

1 Answer
Shiva Prakash M V
Feb 6, 2018

=20x^7-16x^6-21x^5-23x^4+9x

Explanation:

(20x^7-10x^6-9x^5-14x^4+18x) + (-6x^6-12x^5-9x^4-9x)
Index Coefficient
7 --------------(+20+0) =+20
6 --------------(-10-6)=-16
5---------------(-9-12)=-21
4---------------(-14-9)=-23
1--------------- (+18-9)=+9
Thus,
=20x^7-16x^6-21x^5-23x^4+9x

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