Question

Add the polynomials x^3-2x^2-9 and 5x^3+2x+9

Answer 1

5x^3+2x+9+x^3-2x^2-9
5x^3+x^3-2x^2+2x+9-9
6x^3 -2x^2+2x

Answer 2

Answer:

6x^3 - 2x^2 + 2x.

Step-by-step explanation:

(x^3 - 2x^2 - 9) + (5x^3 + 2x + 9)

= x^3 + 2x^2 - 9 + 5x^3 + 2x + 9

= x^3 + 5x^3 - 2x^2 + 2x - 9 + 9.

= 6x^3 - 2x^2 + 2x.