What are the characteristics of the circle function x^2 + y^2 = r^2? Is it always centered at the origin? Does it have a constant radius? Does it intersect the x and y axes? Does it have symmetry?
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Math Question: Find the absolute extrema of the function f(x) = 2x^3 - 9x^2 + 12x + 5 on the interval [-2, 4].