Discussion :: Decimal Fraction  General Questions (Q.No.1)
1. 


Answer: Option B Explanation:

Danny Sawkmie said: (Sep 10, 2011)  
Iven Expression = a2  b2 = (a + b)(a  b) = (a + b) = (2.39 + 1.61) = 4. a  b (a  b) Explain clearly 
Aptitute said: (Sep 20, 2014)  
Given Expression = a^2  b^2 = (a + b)(a  b). (a^2  b^2)/(a  b) = (a + b) = (2.39 + 1.61) = 4. 
Mary Grace said: (Dec 14, 2014)  
Can you explain this clearly? Please. 
Praveen Kumar said: (Jun 7, 2015)  
2.39*2.39 = 5.7121. 1.61*1.61 = 2.6565. 2.391.61 = 0.78. Its nothing 5.71212.6565/0.78 = 4. 
Manas Kumar Patra said: (Jun 23, 2015)  
Can you explain how (a+b)(ab)/(ab)=a+b? 
Suni said: (Dec 27, 2015)  
(a+b)(ab)/(ab), its simple division where ab gets cancelled an that = a+b. 
Franky said: (May 22, 2016)  
This is easy, just (a + b)(a  b)/(a  b). Then just by cancelling the both minus and remaining a+b is the answer. Formula : (a^2)  (b^2) = (a + b)(a  b)/a  b. Enter the amount: (2.39 + 1.61)(2.39  1.61)/2.39  1.69). Cancel both 2.39  1.61)/(2.39  1.69). Then remaining in the numerator is 2.39 + 1.61 = 4. So, the answer is 4. 
Sabit said: (Sep 8, 2016)  
How did the 2nd step come? 
Mahesh said: (Apr 29, 2017)  
Good explanations, Thank you all. 
Sindhu said: (May 4, 2017)  
Not getting this. Please Explain me clearly. 
Ashwani said: (Mar 18, 2018)  
Here the formula of a2b2 = (a+b)(ab). so (a+b)(ab)/(ab) here both (ab) are canceled, so (a+b) is reminder here a= 2.39 & b= 1.61, then 2.39+1.61=4 . 
Rajeswari said: (Apr 1, 2018)  
Not getting this, please explain clearly. 
Lalita said: (Sep 7, 2018)  
Please explain it again. 
Kato Ballack Godfrey said: (Nov 16, 2018)  
Explain how? 
Mr.soumya Dhwaj said: (May 25, 2019)  
See what we have to do is, (a+b)x(ab)/(ab). (2.39+1.61)x(2.391.61) divided by/(2.391.61). Solving them by opening the brackets we get, 4x0.78/0.78. Now by solving it we get a figure =3.12 divided by/0.78. Finally, we get = 4 as our answer. 
Haardhik said: (Jun 29, 2020)  
I can't understand please explain. 
Rohit said: (Jul 24, 2021)  
Why we cannot use separation of denominators? Explain, please. 
V.Gowsigan said: (Mar 9, 2022)  
Super, thanks for explaining. 
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