Math question: Solve the cubic equation x^3 - 5x^2 + 7x - 3 = 0.
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Math question: In a circle, if a central angle measures 120 degrees, what is the measure of its intercepted arc?
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Question: The graph of a quadratic function opens upward and passes through (1, 4). If the vertex is located at (2, -3), find the equation of this quadratic function.