Math question: Prove that if two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the triangles are congruent.
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Math Question: Find the absolute extrema of the function f(x) = x^3 - 6x^2 + 9x on the interval [-2, 5].
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Question: What is the derivative of f(x) = 2x^3 - 5x^2 + 8x - 3?