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    Question

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    A 144 Correct Answer Incorrect Answer
    B 146 Correct Answer Incorrect Answer
    C 142 Correct Answer Incorrect Answer
    D 140 Correct Answer Incorrect Answer

    Solution

    a + 1/a = 12 Squaring both sides, (a + 1/a)2 = 122┬а a2 + 1/a2┬а+ 2 = 144 a2┬а+ 1/a2┬а= 144 - 2┬а a2┬а+ 1/a2┬а= 142

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