You can put this solution on YOUR website! Find the line of symmerty. (1/2 is a fraction)
f(x)=8(x+1/2)^2+17
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Form: y = 8(x-h)^2 + k
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Vertex is (h,k) and axis of symmetry is x = h
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Your Problem
-h = 1/2
h = -(1/2)
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axis of symmetry : x = -1/2
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Cheers,
Stan H.