Question 1031957
Learn to change y=ax^2+bx+c general form  into y=a(x-h)^2+k standard form.


<a href="https://www.youtube.com/watch?v=MD4AiN1Gsmc">This shows how to make the change.</a>


The vertex is the point (h,k) and find the x-intercepts from the standard form by setting y=9 and solve for x.