Solving surd equations Leaving Cert

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@MathsTulla. In this video we look at how to solve surd equations. Isolate the surd to one side of the equation. Surd equations have a square root. Solving radical equations. 3 examples on how to solve surd equations. Leaving Cert Maths
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Example 2 would not work as the square root of 4 is a positive 2 not a negative so the only possible answer is 7.

nokiablockia
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You’re dealing with the positive square root, so 2 would be an extraneous solution in example 2.

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