[ A ] 10 

[ B ] 12  
[ C ] 15  
[ D ] 18 
[ A ] 10 

[ B ] 12  
[ C ] 15  
[ D ] 18 
Answer : Option A 
Explanation : 
$A^2$+$b^2$=29….(i) And ab =3….(ii) Now ,squaring both sides of the equation (ii),We have, $(ab)^2$=$(3)^2$ =$a^2$+$b^2$2ab=9 =292ab=9 [So,$a^2$+$b^2$=29(given)] =2ab=20 = ab = $20\over 2$ = 10 
Copyright 2018  Privacy Policy  Terms and Conditions  Contact us  Advertise
@