The sum of the squares of three numbers is 138, while the sum of their products taken two at a time ...
The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Find the sum?
Answer/Solution
20
Steps/Work
a2+b2+c2=138 and(ab+bc+ca)=131
a+b+c^2=400
root(400)=20
ANSWER E
a+b+c^2=400
root(400)=20
ANSWER E