Determine all triples (x, y, z) of non-negative real numbers that satisfy the following system of equations
$\begin{cases} x^2 - y = (z - 1)^2\\
y^2 - z = (x - 1)^2 \\
z^2 - x = (y -1)^2 \end{cases}$.
1. **Substitution and Simplification:**
   Let \( x = a + 1 \), \( y = b + 1 \), and \( z = c + 1 \). Substituting these into the given system of equations, we get:
   \[
   \begin{cases}
   (a+1)^2 - (b+1) = (c)^2 \\
   (b+1)^2 - (c+1) = (a)^2 \\
   (c+1)^2 - (a+1) = (b)^2
   \end{cases}
   \]
   Simplifying each equation:
   \[
   \begin{cases}
   a^2 + 2a + 1 - b - 1 = c^2 \\
   b^2 + 2b + 1 - c - 1 = a^2 \\
   c^2 + 2c + 1 - a - 1 = b^2
   \end{cases}
   \]
   This reduces to:
   \[
   \begin{cases}
   a^2 + 2a - b = c^2 \\
   b^2 + 2b - c = a^2 \\
   c^2 + 2c - a = b^2
   \end{cases}
   \]

2. **Adding the Equations:**
   Adding all three equations:
   \[
   (a^2 + 2a - b) + (b^2 + 2b - c) + (c^2 + 2c - a) = c^2 + a^2 + b^2
   \]
   Simplifying, we get:
   \[
   a^2 + b^2 + c^2 + 2a + 2b + 2c - (a + b + c) = a^2 + b^2 + c^2
   \]
   \[
   2a + 2b + 2c - (a + b + c) = 0
   \]
   \[
   a + b + c = 0
   \]
   Therefore, \( c = -(a + b) \).

3. **Substituting \( c = -(a + b) \):**
   Substitute \( c = -(a + b) \) into the first equation:
   \[
   a^2 + 2a - b = (-(a + b))^2
   \]
   \[
   a^2 + 2a - b = a^2 + 2ab + b^2
   \]
   \[
   2a - b = 2ab + b^2
   \]
   Solving for \( a \):
   \[
   2a - b = b^2 + 2ab
   \]
   \[
   2a - b = b(b + 2a)
   \]
   \[
   2a - b = b^2 + 2ab
   \]
   \[
   2a = b^2 + 2ab + b
   \]
   \[
   a = \frac{b(b + 1)}{2(1 - b)}
   \]

4. **Substituting into the Second Equation:**
   Substitute \( c = -(a + b) \) and \( a = \frac{b(b + 1)}{2(1 - b)} \) into the second equation:
   \[
   b^2 + 2b - (-(a + b)) = a^2
   \]
   \[
   b^2 + 2b + a + b = a^2
   \]
   \[
   b^2 + 3b + a = a^2
   \]
   Substitute \( a = \frac{b(b + 1)}{2(1 - b)} \):
   \[
   b^2 + 3b + \frac{b(b + 1)}{2(1 - b)} = \left(\frac{b(b + 1)}{2(1 - b)}\right)^2
   \]
   Simplifying this equation, we get:
   \[
   b(3b^3 - 21b + 14) = 0
   \]

5. **Solving the Cubic Equation:**
   The first solution is \( b = 0 \), which leads to \( a = b = c = 0 \), or \( x = y = z = 1 \).

   The solutions of the cubic equation \( 3b^3 - 21b + 14 = 0 \) are given by:
   \[
   b = 2\sqrt{\frac{7}{3}}\cos\left[\frac{1}{3}\arccos\left(-\sqrt{\frac{3}{7}}\right) - \frac{2\pi k}{3}\right], \quad k = 0, 1, 2
   \]
   These are all real solutions. In approximate form, the solutions are:
   \[
   (a, b, c) = (-2.93122, 2.21124, 0.71998)
   \]
   and its cyclic permutations.

The final answer is \( \boxed{ (x, y, z) = (1, 1, 1) } \) and the cyclic permutations of \( (-2.93122, 2.21124, 0.71998) \).