6th Class Mental Ability Algebra Question Bank Algebra

  • question_answer
    The product of the polynomials, \[\mathbf{(3}{{\mathbf{u}}^{\mathbf{2}}}\mathbf{v-5u}{{\mathbf{v}}^{\mathbf{2}}}\mathbf{)}\] and \[\left( \frac{\mathbf{1}}{\mathbf{5}}{{\mathbf{u}}^{\mathbf{2}}}\mathbf{+}\frac{\mathbf{1}}{\mathbf{5}}{{\mathbf{v}}^{\mathbf{2}}} \right)\] is:

    A) \[\frac{3}{5}{{u}^{4}}v-{{u}^{3}}{{v}^{2}}-u{{v}^{4}}+\frac{3}{5}{{u}^{2}}{{v}^{3}}\]

    B) \[\frac{{{u}^{4}}v}{5}-2u{{v}^{2}}+{{u}^{2}}{{v}^{3}}-\frac{5u{{v}^{4}}}{3}\]

    C) \[\frac{3{{u}^{4}}v}{5}-{{u}^{3}}{{v}^{2}}+{{u}^{2}}{{v}^{3}}-5u{{v}^{4}}\]

    D) All of these

    E) None of these

    Correct Answer: A

    Solution :

    Explanation Option [a] is correct. \[(3{{u}^{2}}v-5u{{v}^{2}})\left( \frac{1}{5}{{u}^{2}}+\frac{1}{5}{{v}^{2}} \right)=\frac{3}{5}{{u}^{4}}v+\frac{3}{5}{{u}^{2}}{{v}^{3}}\] \[-{{u}^{3}}{{v}^{2}}-u{{v}^{4}}\]


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