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Discussion :: Square Root and Cube Root

  1. If a = 0.1039, then the value of √4a2 - 4a + 1 + 3a is:

    2. A.
    13.41
    B.
    20.46
    C.
    21.66
    D.
    22.35

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    Answer : Option D

    Explanation :

    √

    4a2 - 4a + 1 + 3a = √(1)2 + (2a)2 - 2 x 1 x 2a + 3a

       = √(1 - 2a)2 + 3a

       = (1 - 2a) + 3a

       = (1 + a)

       = (1 + 0.1039)

       = 1.1039

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