1) find all critical points of </p><p>f(x,y)=6x^2+3xy-2y^2+8 decide if they are maxima, minima, saddle points, or something else. 2)Find the closest point to the origin on the plane</p><p>-2x+y+2z=9

zozo1995

1) find all critical points of f(x,y)=6x^2+3xy-2y^2+8

decide if they are maxima, minima, saddle points, or something else.

2)Find the closest point to the origin on the plane -2x+y+2z=9

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1) find all critical points of&nbsp;</p><p>f(x,y)=6x^2+3xy-2y^2+8 decide if they are maxima, minima, saddle points, or something else. 2)Find the closest point to the origin on the plane</p><p>-2x+y+2z=9