<PRE><B>Question 320030</B>
Explain why the equation x^2 = 4 has two real number solutions, while the equation the square root of x = 2 has only one real number solution.
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Solve x^2 = 4
x^2-4 = 0
Factor:
(x-2)(x+2) = 0
x = 2 or x = -2
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Solve sqrt(x) = 2
Square both sides to get:
x = 4
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Cheers,
Stan H.</PRE>