What is the domain and range of y=2x2−x−6?

1 Answer
Binayaka C.
Jan 28, 2017

Domain (valueof x) is all real numbers.
Range is {y:y≥−498}=[−498,∞)

Explanation:

y=2x2−x−6=2(x2−x2)−6=2(x2−x2+(14)2)−18−6=2(x−14)2−498 Vertex is at (14,−498)
Domain (valueof x) is all real numbers.
Range is {y:y≥−498}=[−498,∞) graph{2x^2-x-6 [-22.5, 22.5, -11.25, 11.25]} [Ans]

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