Sum of the squares of three numbers is 431 and the sum of their products taken two at a time is 265. Find the sum?
Choose one
A) 32  B) 35  C) 25  D) 31  E) 29
(a + b + c)2 = a2 + b2 + c2 + 2(ab +bc + ca) = 431 + 2* 265   a + b + c = √961 = 31   31
<result>D</result>
Sum of the squares of three numbers is 431 and the sum of their products taken two at a time is 265. Find the sum?