I also made my own solution but I didn't continue after I've seen this.I just looked at it and thought if x^2 +y^2 +z^2 = 9
x^2= 2x2
y^2=2x2
z^2=1x1
Then
x^2= 1x1
y^2=2x2
z^2=2x2
and
x^2=2x2
y^2= 1x1
z^2=2x2 Now I look at it and don't know what it even means O_O