Subject

    Bank Exam

    Topic

    Joint Recruitment Test for 7 Banks and 1 Financial Institutions - (Senior Officers/General) - 27.11.2021

    One of the factors of x⁴+x²+1 is -

    ক)
    x²-x+1
    খ)
    x+1
    গ)
    x²-x-1
    ঘ)
    x²-1

    Explanation

    x⁴+x²+1 =x⁴+2x²+1-x² =(x²+1)²-(x)² =(x²+1+x)(x²+1-x) =(x²+x+1) (x²-x+1)

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