Answers

2014-11-16T14:23:07+05:30
5718*5718 4135*4135 / 5718 + 4135 
by using a^2-b^2= (a+b)(a-b)
so
(5718 + 4135)(5718- 4135)/ (5718+4135)

(5718 + 4135 ) will cancel out 
so 
(5718 - 4135) = 1583 

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2014-11-16T17:57:18+05:30
By using a^2-b^2= (a+b)(a-b)
Therefore, (5718+4135)(5718-4135)= (9853)(1583)
(9853)(1583)/5718+4135
= (9853)(1583)/9853
= 1583
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