Hey there!
The answer to your question is
![4x^2+2x-2](https://img.qammunity.org/2022/formulas/mathematics/high-school/3gclklx9ilyd1kpgr14ep1uy9wk4ya2hjo.png)
Given:
![3x^2 +5x-9](https://img.qammunity.org/2022/formulas/mathematics/high-school/ukwr4e2eflv7og2uwnp6nag247jjfv6y11.png)
First, we can start by adding like terms. The following are like terms:
![3x^2](https://img.qammunity.org/2022/formulas/mathematics/high-school/9s152dpqzvljtm92rbelto7ao4rne79bkl.png)
![5x](https://img.qammunity.org/2022/formulas/mathematics/college/sahgoli6hs4tx76lha00bz2x5299209f0h.png)
![-9](https://img.qammunity.org/2022/formulas/mathematics/high-school/tdpfcl617522re7qbwl33ijj2r21ajsywz.png)
Now, we can add these pairs together, giving us:
![4x^2](https://img.qammunity.org/2022/formulas/mathematics/college/lpc8bylv95ax4se9eqxa65nysvdfqunxn0.png)
![2x](https://img.qammunity.org/2022/formulas/mathematics/college/3y24obemat1sbqh4ojf9nzya9r2tcj91aa.png)
![-2](https://img.qammunity.org/2022/formulas/mathematics/college/sdsu9svkllx3i8hyywism1r0jzcwvl4do2.png)
Now, add all this together, and we get our answer as:
![4x^2 + 2x - 2](https://img.qammunity.org/2022/formulas/mathematics/high-school/1810fus1b94czu9tg4ppjjiy35x4tf0z6b.png)
Have a terrificly amazing day!