SOLUTION: Find the x-intercepts of the parabola with vertex of (-4,2) and y-intercept (0,-30).

Question 1056864: Find the x-intercepts of the parabola with vertex of (-4,2) and y-intercept (0,-30).
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let the form of the parabola =

The formula for the x-value of the vertex is:

The vertex is at: ( -4, 2 )

-----------------
The parabola goes through ( 0, -30 )

----------------------------------

Find using ( -4, 2 ) the vertex

and

-----------------
The equation is:

-----------------------------
Does it go through ( -4,2 ) ?

OK
Does it go through ( 0,-30 )
Yes
-----------------------------
Find x-intercepts ( roots )

The x-intercepts are:
( -3, 0 )
( -5, 0 )
----------------------
Here's the plot:

RELATED QUESTIONS
Find the x-intercepts of the parabola with vertex (-5,80) and y-intercept... (answered by ewatrrr)