| 2 * j2 ^2 + 4 * j0 * j0 + 4 * j0 * j2 = 2 * (j2 ^2 + 2 * j0 * j0 + 2 * j0 * j2), 2 * j2 + j0 * 2 = j * 2, 2 * i = 2 * j2 ^2 + 4 * j0 * j0 + 4 * j0 * j2 ⊦ i = j0 ^2 + j ^2 |
2 * j2 + j0 * 2 = j * 2, 2 * i = 2 * (j2 ^2 + 2 * j0 * j0 + 2 * j0 * j2) ⊦ i = j0 ^2 + j ^2