SOLUTION: What is the vertex of the parabola: y= -2x^2+2x+4? When i solved it, i got the vertex as (-2,0) but all the online calculators say the vertex is (.5,4.5). Why is this? can you expl

Question 197604: What is the vertex of the parabola: y= -2x^2+2x+4? When i solved it, i got the vertex as (-2,0) but all the online calculators say the vertex is (.5,4.5). Why is this? can you explain how to find the vertex?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
What is the vertex of the parabola: y= -2x^2+2x+4? When i solved it, i got the vertex as (-2,0) but all the online calculators say the vertex is (.5,4.5). Why is this? can you explain how to find the vertex?
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The vertex of a parabola is always at x = -b/2a
In your problem a = -2 ; b = 2 ; c = 4
x = -b/2a = -2/2(-2) = 1/2 = 0.5
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Cheers,
Stan H.
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