Find the x-intercept of the parabola with vertex (-1,-108) and y- intercept (0,-105). write answer in (x1,y1) (x2,y2) form.

i use the formula
y=a(x-h)^2+k
but this one is not making sense to me

Hello My Melo Friend!

The Vertex form = 

  where A is some constant.
From the y intercept when , so substituting:-




So therefore, our equation =

And For x intercept:-








So Therefore, as we can clearly see, the x intercepts !SHOULD! be at .

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How am i goonna know explain