Question

9. Consider this polynomial expression. (x^2 - x + 1) + (2x^2 + x - 9) What is the sum of the polynomials? A x² - 8 B 3x2-8 C. 3x? - 2x - 8 D. 3x2 + 2x - 8

Answer 1

Given the polynomials:

$\begin{gathered} x^2-x+1 \\ 2x^2+x-9^{} \end{gathered}$

If we add them, we have to add each similar term to get the following:

$\begin{gathered} (x^2-x+1)+(2x^2+x-9)= \\ x^2+2x^2-x+x+1-9=3x^2-8 \end{gathered}$

therefore, the sum of the given polynomials is 3x^2-8