Q&A for How to Solve Radical Equations

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  • Question
    What is √40?
    Community Answer
    √40 = √[(4)(10)] = 2√10.
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  • Question
    How did you get x = 2.53, 11.47?
    I_l1ke_gam3s
    Community Answer
    Using the quadratic formula, these were the values they got. However, one of them didn't work, and therefore was an "extraneous" solution.
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  • Question
    How do I isolate 2x cubed?
    Community Answer
    (2x)^3 = (2x)(2x)(2x) = 8x^3.
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  • Question
    How do you find x in radicals?
    I_l1ke_gam3s
    Community Answer
    If you wanted to solve √x = 5, for example, you would square both sides to get x = 25.
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