Solve the equation by applying the squaring property of equality. Be sure to check all solutions in the original equation. If there is no solution , so indicate. 
Definitions:
Valid Inference
A logical conclusion drawn from premises that are accepted as true, ensuring the conclusion necessarily follows from them.
Copernicus
A Renaissance mathematician and astronomer who formulated a model of the universe that placed the Sun rather than the Earth at its center.
Sound Argument
An argument with true premises that also passes the Test of Logical Strength.
Valid
Sound or well-founded; logically correct and acceptable.
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