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    Subject

    Bank Exam

    Topic

    Southeast Bank Ltd. - Probationary Officer - 2016

    m +m−5 =5,\sqrt m  + \sqrt {m - 5}  = 5, what is the value of m ?

    ক)
    8
    খ)
    7
    গ)
    6
    ঘ)
    9

    Explanation

    Solution: যদি m +m−5 =5,\sqrt m  + \sqrt {m - 5}  = 5, হয় তবে m এর মান কত ? দেওয়া আছে, m +m−5 =5\sqrt m  + \sqrt {m - 5}  = 5 =>  (m−5)2  =(5−m)2  {(\sqrt {m - 5} )^{2\;}} = {(5 - \sqrt m )^{2\;}}    [বর্গ করে ] =>  m - 5 = 5 2 - 2.5 ×m +(m)2   \times \sqrt m  + {(\sqrt m )^{2\;}} => m - 5 = 25 - 10m +m10\sqrt m  + m =>  m + 10m −m10\sqrt m  - m = 30 =>  10m10\sqrt m = 30 =>  m\sqrt m = 3 => (m)2  {(\sqrt m )^{2\;}} = 3 2 m = 9.

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