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• # IMAT 2015 Q58 Physics and Mathematics

Thomas P updated 3 weeks, 4 days ago 3 Members · 3 Posts
• ### 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)

• ### 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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