What is the factored form of the quadratic equation x^2 - 9x + 20?
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What is the value of f(10) + f(e) if f(x) = log x / f(x) = ln x?
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Math Question: In triangle ABC, angle A measures 60 degrees. If the angle bisector of A intersects side BC at point D, and side BC measures 10 units, what is the length of BD?