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9th Class Mathematics Polynomials Question Bank Polynomials

  • question_answer
    Find the value of the polynomial\[{{x}^{2}}-x-1\]at\[x=-1\].

    A)  \[-3\]                           

    B)         \[1\]                

    C)         \[-1\]                           

    D)         \[0\]

    Correct Answer: B

    Solution :

    Let \[p(x)={{x}^{2}}-x-1,\] \[p(-1)=2-1=1\] \[\therefore \]Value of the given polynomial \[p(x)\]at \[x=-1\]is 1.


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