Subject

    Bank Exam

    Topic

    Southeast Bank Ltd. - Trainee Officer - 2018

    If P = 5 + 2\sqrt 2 then the value of P2is

    ক)
    25 + 10\(\sqrt 2 \)
    খ)
    20 + 5\(\sqrt 2 \)
    গ)
    27 + 10\(\sqrt 2 \)
    ঘ)
    27

    Explanation

    দেওয়া আছে, P = 5 + 2\sqrt 2 => (P) 2 = (5 + 2\sqrt 2 ) 2 [ বর্গ করে ] => P 2 = 5 + 2 × \times 5 × \times  2\sqrt 2 + (2)2  {(\sqrt 2 )^{2\;}}        [ (a + b) 2 = a 2 + 2ab + b 2 ] => P 2 = 25 + 102\sqrt 2 + 2 => P 2 = 27 + 102\sqrt 2 p 2 = 27 + 102\sqrt 2

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