Algebra 2: Section 5.4 - Solving Radical Equations and Inequalities

[@Yarkz.]

4:40 Wouldn't the fourth root of 16 also be -2? or does it always have to be positive when checking for an extraneous solution?

[@curtaincommander]

Good question! The only time you need the +/- is when you *take* an even root of both sides. In this case, the 4th root was already present from the beginning, meaning we already knew we were only working with the positive 4th root for this problem.

[@Yarkz.]

@@curtaincommander@curtaincommander Oh, I get it now. Thank you so much.

[@pieface367]

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[@matthewcabrera6226]

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[@yeoslovelyblu]

Real

[@noliq77]

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