Hope these notes help ! https://mathbitsnotebook.com/Algebra1/Quadratics/QDVertexForm.html
Your answer is 13.44 and rounded to the whole is still going to be 13
In the default window of a graphing calculator, there is only one intersection that you see.
However, if you zoom out, you will see that they are 3 intersections to the pair of equations.
YOUR ANSWER IS 15i radical 6
