Ononot — Given f(x) = ax^2 + bx + c, if the vertex of the parabola is

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Equations & Systemsmedium

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Given $f(x) = ax^2 + bx + c$ , if the vertex of the parabola is at $(2, 5)$ and the parabola passes through $(0, 1)$ , what is the value of $a$ ?