Multiple Choice Questions on x4 5x3 6x2 is equal to ........ for RRB(NTPC) Exam Preparation

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Multiple Choice Questions

x4 5x3 6x2 is equal to ........

Quantitative Aptitude (RRB NTPC) Algebra
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    (x4 + 5x3 + 6x2) is equal to :
    x(x + 3)(x2 + 2)
    Incorrect Answer

    x2 (x + 3)(x + 2)

    Correct Answer
    x2(x – 2)(x – 3)
    Incorrect Answer
    x(x2 + 3)(x + 2)
    Incorrect Answer
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    Explanation:

    (x4 + 5x3 + 6x2)
    = x2(x2 + 5x + 6)
    = x2(x2 + 3x + 2x + 6)
     =  x2 (x + 3)(x + 2).

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