- #1
ahhppull
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Homework Statement
Find the local max/min or saddle points of f(x,y) = (x-y)(1-xy)
Homework Equations
The Attempt at a Solution
I expanded the equation to f(x,y) = x-y-(x^2)y+xy^2.
Then I found the partial derivatives of the function.
fx = 1-2xy +y^2
fy = -x^2-2xy
I'm stuck after this part. Usually I can set the function to 0 and solve for x or y, but I can't do that here.