find the x-intercepts of the parabola with vertex (4,-1) and y-intercepts (0,15). write your answer in this form : (x1,y1),(x2,y2)

Question

mathmale · Answer

You are given the vertex of the parabola, along with one point on the graph of the parabola.  This is enuf info with which to find the equation of the parabola in vertex form.  Please find that equation now.

To find the x-intercepts, let y=0 and solve for x.  Should obtain 2 different x-values.

mathmale · Answer

The "vertex form of the equation of a parabola" is$$y-k=a(x-h)^2$$

mathmale · Answer

where (h,k) represents the vertex.  Hint:  get your x and y values from the given y-intercept.

mathmale · Answer

Find the value of a.
Then write out the completed equation for this parabola.

ovidia · Answer

but I don't understand