Hello,

I've just started on Non-linears and am Stuck on my first problem.

Heres the equations:

x^2 + y^2 =13

y = x+1

This is how far I've got, I would appreciate it if someone could show me where I'm going wrong.

- x^2 + (x+1)(x+1) = 13
- x^2 + (x^2+x+x+1) =13
- 2x^2 + 2x + 1 = 13
- 2x^2 + 2x -12 = 0
- x^2 + x -6 = 0

Now I'm stuck.

I've done this over and over and keep getting x^2=3 yet I know it should be x=2