SOLUTION: i need the vertex of equation y equals -x^2+2x+3

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Question 137048This question is from textbook algebra 1
: i need the vertex of equation y equals -x^2+2x+3This question is from textbook algebra 1

Answer by stanbon(48563) About Me  (Show Source):
You can put this solution on YOUR website!
i need the vertex of equation y equals -x^2+2x+3
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You have a quadratic with a=-1, b=2, and c = 3
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The vertex occurs when x = -b/2a = -2/-2 = 1
The corresponding y value is -(1^2)+2*1+3 = 4
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Vertex: (1,4)
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See it:
graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C-x%5E2%2B2x%2B3%29
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Cheers,
Stan H.