How To Find The Roots Of An Equation In Vertex Form. (a will stay the same, h is x, and k is y). (h,k) is the vertex as you can see in the picture below.
A ( x − h) 2 + k = 0 a ( x − h) 2 = − k ( x − h) 2 = − k / a x − h = ± − k / a x = h ± − k / a. A quadratic is a second degree polynomial of the form:
42A Graphing Quadratic Equations In Vertex Form
Alternatively, you can find the roots of the equation by first converting the equation from vertex form back to the standard quadratic equation form, then using the quadratic formula to solve it. And then plug those values.