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Select the x coordinate of the vertex of the parabola

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defined by the function f(x) = -3x^2 +5x +7?

vertex-of-a-parabola

asked Sep 2, 2014 in PRECALCULUS by anonymous

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1 Answer

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The function f(x) = - 3x²+ 5x + 7

y = - 3x²+ 5x + 7

Compare it to parabola equation y = ax²+ bx + c

a = -3, b = 5, c = 7

The x coordinate of vertex is axis of symmetry x = -b/2a

x = -5/2(-3)

x = 5/6

answered Sep 2, 2014 by david Expert

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