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5 October, 21:16

Let $b$ and $c$ be constants such that the quadratic $-2x^2 + bx + c$ has roots $3+/sqrt{5}$ and $3-/sqrt{5}$. Find the vertex of the graph of the equation $y=-2x^2 + bx + c$.

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  1. 5 October, 22:38
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    X = and that the line has an y-intercept of (0, 1) which could have been determined from the c-value which is 1. - b/2a=-2/2.1=-1
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