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Error in math book? Please view this.

  1. Nov 22, 2007 #1

    Isn't it true that the "y" does NOT belong under the radical symbol on the right side?
  2. jcsd
  3. Nov 22, 2007 #2


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    It's not under the radical. Only x is under the radical.
  4. Nov 22, 2007 #3
    Correct as written, probably would have helped for the author to use parenthesis.
  5. Nov 22, 2007 #4


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    Or either beside the 18 for clarity.
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