What is the square root of x plus 8 equals 0?

if sqrt(x) + 8 = 0, then:

x1/2+8 = 0

x1/2 = -8

(x1/2)2 = (-8)2

x = 64

√x + 8 = 0 is a contradiction equation, because the equivalent equation √x = -8 is not a true statement, because √x = |x| = positive. So that,

- √x + 8 = 0 is true for x = 64.