extrema -x^2-y^2+6x+6y-yx - Wolfram|Alpha

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Input interpretation

extrema | -x^2 - y^2 + 6 x + 6 y - y x

Result

Global maximum

$max{-x^2 - y^2 + 6 x + 6 y - y x} = 12 at (x, y) = (2, 2)$

Global minima

(no global minima found)

Local extrema

Local maximum

$max{-x^2 - y^2 + 6 x + 6 y - y x} = 12 at (x, y) = (2, 2)$

Local minima

(no local minima found)

Contour plot

Contour plot

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