Not sure how to solve this system of equations (easy)

[bmed90]

Homework Statement

Im trying to find local min and max values. So I have fx and fy. I need to find critical points by setting them equal to 0


4x^3-4y=0 and 4y^3-4x=0

Homework Equations

4x^3-4y=0 and 4y^3-4x=0

are fx and fy respectively

The Attempt at a Solution

I just need to know how you would solve this set of 2 equations to get the points (0,0),(1,1) AND (-1,-1)

 

[Mark44]

Solve for one variable in one of the equations, and substute for that variable in the other equation.

 

[bmed90]

Yes I tried that, being that is the obvious way to do it. I just couldn't do the algebra. Thanks

 

[bmed90]

Nevermind, I got it =D