SOLUTION: Determine whether the graph of the parabola opens upward or downward and determine the range. F(x) = 2(x+2)^2 -8

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: Determine whether the graph of the parabola opens upward or downward and determine the range. F(x) = 2(x+2)^2 -8      Log On


   

Question 960130: Determine whether the graph of the parabola opens upward or downward and determine the range.
F(x) = 2(x+2)^2 -8
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
if the coefficient of the x^2 term is positive, then the parabola opens up.

if the coefficient of the x^2 term is negative, then the parabola opens down.

this parabole opens up because the coefficient of the x^2 term is positive.

2 * (x+2)^2 is equal to 2 * (x^2 + 4x + 4) which is equal to 2x^2 + ........

here's the graph of your parabola.

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