[b]n=2[/b][br] [b]f[sub]2[/sub](x, y) = k_f *(-2 x⁵ y - 2y⁶ - 2x² y² + 2y³ + x³ + 3x² + 4y² + x y + x - y - 5)[/b][br][b][size=85][b] List of stationary points of the function f[b][sub]2[/sub][/b](x, y) found by CAS GeoGebra:[br][/b][color=#ff0000][u]Local maximum points[/u][/color]➟[/size][br][size=85] [color=#a61c00]{(-0.5859579913713, -0.7589219164342), (0.9382201861925, 0.9115586250164)}[/color];[/size][br][b][color=#0000ff][u][size=85]Local minimum points[/size][/u][/color]➟[br][/b][size=85][color=#1e84cc] {(-0.2156464889144, 0.1404012457919)[/color][color=#0000ff];[/color][/size][br][color=#38761d][u][size=85]Saddle points[/size][/u][/color][b]➟[/b][size=85] [br][color=#6aa84f] {(-0.06393113961456, -0.7873249409675), (-1.044769689623, -0.1714355256084), (1.10346396573, 0.6714525932472), (-0.6559737109602, 0.9705096938403)}.[br][br][/color][color=#333333]*Detailed instructions and explanations for this applet can be found in the previous [url=https://www.geogebra.org/m/vdfrrapq]applet[/url].[/color][/size][/b]