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17 September, 15:52

Solve for x, given the equation Square root of x minus 5 + 7 = 11. x = 21, solution is extraneous x = 21, solution is not extraneous x = 81, solution is extraneous x = 81, solution is not extraneous

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  1. 17 September, 17:34
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    This is the concept of algebra, to solve the expression we proceed as follows:

    √ (x-5) + 7=11

    put like terms together:

    √ (x-5) = 11-7

    √ (x-5) = 4

    squaring both sides we get:

    x-5=16

    x=16+5

    x=21

    The solution is not extraneous.
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