Question

Find the sum of these polynomials

(x2 – x + 7) + (9x2 + 6) =

A. 9x2 – x + 1
B. 10x2 – x + 13
C. 10x2 – x + 1
D. 9x2 – x + 13

Answer 1

Hi there! The answer is B.


`( {x}^(2) - x + 7) + (9 {x}^(2) + 6)`
First we work out the parenthesis, which is easy because we can just remove them.


`{x}^(2) - x + 7 + 9 {x}^(2) + 6`
Now rearrange our expression (in order to collect terms later).


`{x}^(2) + 9 {x}^(2) - x + 7 + 6`
Next up is collecting the terms.


`10 {x}^(2) - x + 13`
The answer is B.

~ Hope this helps you!