Subject

    Bank Exam

    Topic

    Bangladesh Bank AD 2011

    Square of a number plus two times the number equal What is the number?

    ক)
    7
    খ)
    9
    গ)
    -9
    ঘ)
    7 or -9

    Explanation

    x2+2x=63 =x2+2x-63=0 x=-9,x=7

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