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  • IMAT 2015 Q58 Physics and Mathematics

  • Nicolas Sanchez

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    June 22, 2021 at 5:26 am
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    Evaluate:
    (27² – 23²) + (14² – 6²)

    A. 1680

    B. 360

    C. 80

    D. 840

    E. 40

  • MANISH MULCHANDANI

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    July 30, 2021 at 12:51 am
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    Answer= B

    For this question, you can simply square each number and subtract according to brackets, that is (27*27-23*23) + (14*14-6*6).

    Solve it and you will get required value.

    Don’t go for formula method that is, (a^2-b^2)= (a-b)(a+b)

    Nicolas Sanchez voted up
  • Thomas P

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    August 23, 2021 at 10:00 pm
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    Though .. formula method (a^2-b^2)= (a-b)(a+b) makes the calculus easier

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