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19 September, 08:34

Find x if (117 + x) (V17 - x) = 12.

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  1. 19 September, 09:48
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    Answer: x = ±√145

    Step-by-step explanation:

    √ (17 + x) * √ (17 - x) = 12

    √ (17 + x) (17 - x) = 12

    Squaring both sides,

    (√ (17 + x) (17 - x)) ^2 = 12^2

    (17 + x) (17 - x) = 144

    17 (17 - x) + x (17 - x) = 144

    289 - 17x + 17x - x^2 = 144

    x^2 = 289 - 144

    x^2 = 145

    x = ±√145
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