(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the local max/min or saddle points of f(x,y) = (x-y)(1-xy)

2. Relevant equations

3. 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.

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# Homework Help: Local Max/Min and saddle points

**Physics Forums | Science Articles, Homework Help, Discussion**