SOLUTION: What are the x-intercepts of a parabola witha vertex (4,-1) and y intercept of (0,15) with answer in the form (x1,y1), (x2,y2)

Question 749467: What are the x-intercepts of a parabola witha vertex (4,-1) and y intercept of (0,15) with answer in the form (x1,y1), (x2,y2)
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
Checking how the vertex and the y intercept are arranged on a graph, we can understand that the parabola opens upward, having the vertex as a minimum.

standard form in which .
Using your vertex coordinates,

The given y intercept point allows the equation,

Standard form equation is then specifically
or simply

From that standard form equation, you can finish finding the x intercepts on your own. Just let y = 0 and solve for x. .
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