Find the x-intercepts of the parabola with vertex (-3,16) and y-intercept (0,-20). Write your answer in this form: (x,y),(x,y). If necessary, round to the nearest hundredth.

Question

shallowgam3r · Answer

someone please help

shallowgam3r · Answer

i only have about 14 minutes to answer this question..

shallowgam3r · Answer

@freckles   @brill   i keep seeing these two names. can one of you please help me

anonymous · Answer

I would recommend using vertex form
Which is
$$y=a(x-h)^2+k$$

anonymous · Answer

This is where h and k are the vertex coordinates in the form (h,k)
In this case the vertex, (-3, 16), would be substituted as 
$$y=a(x+3)^2-16$$

anonymous · Answer

You can now substitute other point in, for example the y-intercept is (0,-20) so you can substitute that in for x and y and solve
So that would be
$$-20=a(0+3)^2-16$$
What would a be when you solve?

anonymous · Answer

5/7=a/35