# SOLUTION: Find the x-intercepts of the parabola with vertex of (-2,-8) and y-intercepts of (0,4).I have no Idea how to solve this please help.

Algebra ->  Algebra  -> Quadratic-relations-and-conic-sections -> SOLUTION: Find the x-intercepts of the parabola with vertex of (-2,-8) and y-intercepts of (0,4).I have no Idea how to solve this please help.      Log On

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 Algebra: Conic sections - ellipse, parabola, hyperbola Solvers Lessons Answers archive Quiz In Depth

 Question 389594: Find the x-intercepts of the parabola with vertex of (-2,-8) and y-intercepts of (0,4).I have no Idea how to solve this please help.Answer by ewatrrr(10682)   (Show Source): You can put this solution on YOUR website!``` Hi, the vertex form of a parabola, where(h,k) is the vertex vertex (-2,-8) y =a(x+2)^2 -8 using y-intercept pt(0,4) to find a 4 = a(-2)^2 -8 12 = 4a 3 = a y = 3(x+2)^2 -8 finding x-intercepts when y = 0 0 = 3(x^2 + 4x + 4) -8 0 = 3x^2 + 12x + 4 Present these x values as is traditional for your classroom ```