Question

Add the polynomials (simplify) (x^2 + 7x + 6) + ( -8x^2 + 11x-9)

Answer 1

`-7x^2+18x-3`

Explanation:

We have the following polynomials:

`\begin{gathered} x^2+7x+6 \\ -8x^2+11x-9 \end{gathered}`

We perform the sum, grouping the similar terms and then operating in each case, just like this:

`\begin{gathered} \: (x^2+7x+6)+(-8x^2\: +\: 11x-9) \\ \: x^2+7x+6-8x^2\: +\: 11x-9 \\ (x^2-8x^2)+(7x+11x)+(6-9) \\ -7x^2+18x-3 \end{gathered}`