Sum of the squares of three numbers is 179 and the sum of their products taken two at a time is 131. Find the sum?
Choose the correct answer
A) 20 B) 22 C) 26 D) 28 E) 29
(a + b + c)2 = a2 + b2 + c2 + 2(ab +bc + ca) = 179 + 2* 131   a + b + c = √441 = 21   22
<result>B</result>
Sum of the squares of three numbers is 179 and the sum of their products taken two at a time is 131. Find the sum?