- #1

ahhppull

- 62

- 0

## 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.