1955 AHSME Problems/Problem 20
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Problem 20
The expression equals zero for:
Solution
We can make the following equation: , which means that Square both sides, and we get , which would mean that , but that is an extraneous solution and doesn't work in the original equation.
Therefore, the correct answer is
Note: When talking about square roots, it generally means the positive square root, or the "principal root."
See Also
1955 AHSC (Problems • Answer Key • Resources) | ||
Preceded by Problem 19 |
Followed by Problem 21 | |
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