Sum of the squares of 3 no. is 52 and the sum of their products taken two at a time is 72. Find the sum?  Choose the correct choice from the following answers
A) 18	B) 21	C) 13	D) 16	E) 14
(a + b + c)2 = a2 + b2 + c2 + 2(ab +bc + ca) = 52 + 2* 72   a + b + c = âˆš196 = 14   Answer 14
<result>E</result>
Sum of the squares of 3 no. is 52 and the sum of their products taken two at a time is 72. Find the sum?