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Find the local extrema for f(x, y) = x - 2xy +4y-6x-6y+8 f(5, 2) = -13 is a minimum f(1. 1) = -1 is

Find the local extrema for f(x, y) = x - 2xy +4y-6x-6y+8 f(5, 2) = -13 is a minimum f(1. 1) = -1 is a minimum f(-5, 2) = 55 is a maximum f(0, 0) = 1 is a minimum

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