Start by remembering that the square root symbol gives the non-negative root. The equation says that √(x + 0) is 8. To remove the square root, square both sides: x + 0 = 8² = 64. Now isolate x by moving the constant to the other side, so x = 64 - 0 = 64. Always check radical equations: substituting x = 64 makes the expression inside the root equal to 64, and √64 = 8. So the correct answer is 64.