Question 690020
What is the vertex in the quadratic equation x2 + 8x + 7 = y? 
Input your answer in the form: (x, y)
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Conplete the square:
y = x^2 + 8x + 16 + 7 - 16
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y = (x+4)^2 - 9
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Vertex: (-4,-9)
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{{{graph(400,400,-10,10,-15,15,x^2+8x+7)}}}
Cheers,
Stan H.
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