Banking Sample Paper RRB Assistant (PT) Sample Test Paper-1

  • question_answer
    \[\frac{{{(a-b)}^{2}}-{{(a-b)}^{2}}}{-4a}=\frac{x}{y}\]. Simplify the above equation.

    A) \[xy=b\]

    B) \[bx=y\]

    C) \[ab=x\]

    D) \[yb=x\]

    E) \[ay=x\]

    Correct Answer: D

    Solution :

    According to the question. \[\frac{{{(a-b)}^{2}}-{{(a+b)}^{2}}}{-4a}=\frac{x}{y}\] or,\[y\times \{({{a}^{2}}+{{b}^{2}}-2ab-({{a}^{2}}+{{b}^{2}}+2ab)\}=-4ax\] or,\[by=x\]


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