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Mathematics
Beckham
22 July, 09:20
Graph f (x) = -2x^2-12x-21
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Nathan Rice
22 July, 11:41
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Step-by-step explanation:
First, find the vertex. The x coordinate is - b/2a, or 12/-4=-3. Plug this back in to get - 18+36-21 or - 3, so the vertex is (-3, - 3). Now, slowly make the x - 2, - 1, 0, 1, on and on. Because parabolas are symmetric along the vertex, they will have the same values as - 4, - 5, - 6, on and on.
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