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Practice problem

Identify Extraneous Solutions to Radical Equations

By Alex Federspiel
+3 contributors
Contributors

Joe solves x−3=30−2xx-3=\sqrt{30-2x} by squaring to get (x−3)2=30−2x(x-3)^2 = 30-2x, and solving the resulting quadratic. Which of the solutions to the quadratic are extraneous?

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Type a concept, like “slope” or “photosynthesis”.

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