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Q.

Value of 525 2 − 475 2  is


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a

100

b

10000

c

50000

d

100000 

answer is C.

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Detailed Solution

Given 525 2 − 475 2  
By using, a 2 − b 2 =(a+b)(a−b)   Let a=525 and b=475
Now substitute the values in above formula
(525+475)(525−475) =1000(50) =1000×50 =50000  
The value of 525 2 − 475 2  is 50000.
Therefore, the correct option is 3.
 
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