Menu
Home / Arithmetic Aptitude / Decimal Fraction :: Discussion

Discussion :: Decimal Fraction

  1. The given expression (11.98 * 11.98 + 11.98 * x + 0.02 * 0.02) will be a perfect square for x equal to

    2. A.
    0.02
    B.
    0.2
    C.
    0.04
    D.
    0.4

    View Answer

    Workspace

    View Answer

    Answer : Option C

    Explanation :

    We know that the formula of (a+b) 2 = a2 + b2 + 2ab
    Let a = 11.98, and b = 0.02
    Here, the expression should be 11.98*11.98 + 0.02*0.02 + 2*11.98 * 0.02
    But the actual expression is 11.98 * 11.98 + 0.02*0.02 + 11.98 * x
    Compare both the expression, we get x = 2*0.02 = 0.04

Write your comments here:

Be The First To Comment