SOLUTION: 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.

Question 320030: 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.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
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.
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