I don't understand why this is a no solution
original problem
√(x-5) - √(x-8) = 3
My solution attempt
add +√(x-8) to both sides:
√(x-5) - √(x-8) = 3
√(x-5) = 3 + √(x-8)
squaring both sides:
(√(x-5))^2 = (3 + √(x-8))^2
FOIL out the right side:
x - 5 = 3^2 +...