# Extraneous solution

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## Extraneous Solution

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## Identify Extraneous Solutions to Radical Equations

By Calculator: Set the equation to equal zero (this ends up being √x + 4 − x + 2 = 0) Plug this into the y = button on your TI-83/84 calculator Find the value of each of your solutions (go to 2nd

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So this is an extraneous solution. They key here is that we multiplied both sides by a variable expression. In this case, we multiplied both sides by x minus one. You can do that. You can multiply both sides by a variable expression, and it is