need help solving equation x+y+z=2, 2xy-zz=4

[nikuska]

I need to solve this equation
x+y+z=2
2xy-zz=4
Can anyone help me? :shock:

 

[stapel]

This doesn't look like one "equation"; it appears to be a system of two equations. Should be assume that "zz" means "z²"?

Note: You have two equations in three unknowns, so it is not possible to obtain a unique solution.

Eliz.