SOLUTION: what are the X intercepts of the parabola with vertex (5,-12) and Y intercept of(0,63) i have tried running it though this equation {{{y-k=a(x-h)^2}}} but i am confused on how the

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: what are the X intercepts of the parabola with vertex (5,-12) and Y intercept of(0,63) i have tried running it though this equation {{{y-k=a(x-h)^2}}} but i am confused on how the      Log On


   

Question 1088197: what are the X intercepts of the parabola with vertex (5,-12) and Y intercept of(0,63)
i have tried running it though this equation y-k=a%28x-h%29%5E2 but i am confused on how the "a" value is found or produced.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use the point.
So, start with the vertex form,
y%2B12=a%28x-5%29%5E2
So then substituting the point,
63%2B12=a%280-5%29%5E2
a=%2863%2B12%29%2F25
Solve for a.