Find the absolute maximum and the absolute minimum of the function (vector calculus)

Apr 2012
14
0
portland
Find the absolute maximum and the absolute minimum of the function f(x,y)=x^2+xy-y
on the closed triangle with vertices at the points (0, 0), (0, –3), (3, –3).
Show your work and give the x, y, and z values at each extreme.

thanks