SOLUTION: The vertex of a parabola is (-2,4). One x-intercept is -4. What is the other x-intercept.

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: The vertex of a parabola is (-2,4). One x-intercept is -4. What is the other x-intercept.      Log On


   

Question 210479: The vertex of a parabola is (-2,4). One x-intercept is -4. What is the other x-intercept.
Answer by Earlsdon(6294) About Me  (Show Source):
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A parabola is bisected by its line of symmetry which is a vertical line passing through the parabola's vertex. This parabola opens downward if its vertex is at (-2, 4) and it intercepts the x-axis. If one of the parabola's x-intercept is at (-4, 0) then its other intercept, which is equidistant from the line of symmetry, must be at (0, 0).