10th Class Mathematics Polynomials Question Bank Polynomial

  • question_answer
    If \[1\pm \sqrt{3}\] are the two zeroes of the polynomial\[f\left( x \right)={{x}^{4}}-4{{x}^{3}}+{{x}^{2}}+6x+2,\]then the other two zeroes of the polynomial f(x) are:

    A)  \[\left( -5+\sqrt{5},-5-\sqrt{5} \right)\]     

    B)  \[(1,2)\]

    C)  \[\left( 3+\sqrt{2},3-\sqrt{2} \right)\]       

    D)  \[\left( 1+\sqrt{2},and1-\sqrt{2} \right)\]

    Correct Answer: D

    Solution :

    (d):\[g(x)=\left[ x-\left( 1+\sqrt{3} \right) \right]\left[ x-\left( 1-\sqrt{3} \right) \right]={{x}^{2}}+2x-2:\] Now,\[\frac{f(x)}{g(x)}:{{x}^{2}}+2x-2){{x}^{4}}-4{{x}^{3}}+{{x}^{2}}+6x+2\](Find quotient q(x).


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