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10th Class Mathematics Polynomials Question Bank MCQs - Polynomials

  • question_answer
    For what value of p, 1 is a zero of the polynomial \[f(x)=2{{x}^{2}}+5x-(3p+1)\]?

    A) \[3\]

    B) \[5\]         

    C) \[2\]

    D) \[-1\]

    Correct Answer: C

    Solution :

    [c] Since 1 is a zero of the polynomial
    \[f(x)=2{{x}^{2}}+5x-(3p+1),\]then \[f(1)=0\]
    i.e.,     \[2{{(1)}^{2}}+5(1)-(3p+1)=0\]
    \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,2+5-3p-1=0\Rightarrow p=2\]


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