Start by remembering that the square root symbol gives the non-negative root. The equation says that √(x + 2) is 10. To remove the square root, square both sides: x + 2 = 10² = 100. Now isolate x by moving the constant to the other side, so x = 100 - 2 = 98. Always check radical equations: substituting x = 98 makes the expression inside the root equal to 100, and √100 = 10. So the correct answer is 98.