If $$\(x\)$$ is real, $$\(\sqrt{2-\sqrt{2+x}}=x\)$$, then the only possible value of $$\(x\)$$ is.
A.
1
B.
\(\frac{\sqrt{2}}{2}\)
C.
\(\frac{\sqrt{3}-1}{2}\)
D.
\(\frac{\sqrt{5}-1}{2}\)
Exam No：2019 First Round Grades 10-12 Year：2019 Question No：21
Answer:
D
Knowledge points:
G10-12 - Algebra - Radical Equations
Solution:
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