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12 December, 14:38

Solve for x, given the equation Square root of x plus 9 - 4 = 1.

x = 16, solution is not extraneous

x = 16, solution is extraneous

x = 34, solution is not extraneous

x = 34, solution is extraneous

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Answers (1)
  1. 12 December, 18:31
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    The given condition may be mathematically expressed as,

    sqrt (x) + 9 - 4 = 1

    Group all the constants to the same side of the equation,

    sqrt (x) = - 4

    Squaring both sides give an answer of x = 16.

    The answer for the question above is x = 16 is not an extraneous root because if we substitute this value to the x of the equation, the equation becomes true.
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