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.
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