What is the sum of the polynomials? (9x4-13x3-x-7) + (7x3-2x+1) A.) - 6x^6+9x^4-3x^2-6 B.) - 6x^6+9x^4-x-8 C.) 9x^4-6x^3-x-8 D.) 9x^4-6x^3-3x-6

Question

Gretchen Holden

Mathematics

2 July, 19:10

What is the sum of the polynomials? (9x4-13x3-x-7) + (7x3-2x+1) A.) - 6x^6+9x^4-3x^2-6 B.) - 6x^6+9x^4-x-8 C.) 9x^4-6x^3-x-8 D.) 9x^4-6x^3-3x-6

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Answers (2)

Know the Answer?

Jayce Norman · Answer 1

(9x^4-13x^3-x-7) + (7x^3-2x+1) =

9x^4-13x^3-x-7+7x^3-2x+1=

9x^4 + (-13+7) x^3 + (-1-2) x-7+1=

9x^4 + (-6) x^3 + (-3) x-6=

9x^4-6x^3-3x-6

Answer: Option D.) 9x^4-6x^3-3x-6

Desirae Lambert · Answer 2

The answer to the question above is:

D.) 9x^4-6x^3-3x-6

Explanation: In adding polynomials, you have to directly add the similar terms. Always remember that you cannot add dissimilar terms. That is why the correct answer is letter D.