SOLUTION: f(x)=2x^2-4x-1 find the domain and range ( enter answers using interval notation)

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Question 1028929: f(x)=2x^2-4x-1
find the domain and range ( enter answers using interval notation)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Convert to vertex form,
y=2%28x%5E2-2x%29-1
y=2%28x%5E2-2x%2B1%29-1-2
y=2%28x-1%29%5E2-3
Vertex is at (1,-3) and the parabola opens upwards.
So the domain is all real numbers.
The range is [-3,infinity).