Multiple Choice Questions on The expression 2x3 x2 minus 2x minus 1 is divisible by ........ for CDS Exam Preparation

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Multiple Choice Questions

The expression 2x3 x2 minus 2x minus 1 is divisible by ........

Quantitative Aptitude (CDS) Quadratic Equations
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    The expression 2x3 + x2 − 2x − 1 is divisible by

     x + 2

    Incorrect Answer

    2x + 1

    Correct Answer

    x − 2

    Incorrect Answer

     2x − 1

    Incorrect Answer
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    Explanation:

    f(x) = 2x3 + x2 − 2x − 1
    = x2(2x + 1) − 1(2??x+ 1) = (2x + 1)(x2 − 1)
    So, given expression is divisible by 2x+ 1

    By: Munesh Kumari
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