Hi, I answered the question on a piece of paper, and took a photo of it. You can find it in the photo attached below. I also included some extra information about this type of question below.
First, this is a quadratic equation as it has x^2. So, there are 2 ways to solve this, either by using the multiplication frame or using the quadratic formula.
I solved it by using the multiplication frame as it is a shorter method. The quadratic formula is usually used when we can't do it by using multiplication frame (when the answer involves decimals) or the numbers are too big (and it is hard to do by using multiplication frame).