Math Question: In a circle, if two chords intersect, the angle formed from the intersection is equal to the average of the arcs subtended by the chords. Prove it using Circle Theorems.
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Math question: Find the derivative of f(x) = 5x^3 - 2x^2 + 8x - 4.
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Math Question: Determine the vertex of the parabola given by the equation π¦ = 2π₯^2 + 4π₯ - 3.