Mathematics
Medium
Question
The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is :___________?
A
20
✓ Official correct answer
B
30
C
40
D
None of these
Community credibility
Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.
A
20
No member explanations yet for this option.
B
30
No member explanations yet for this option.
C
40
No member explanations yet for this option.
D
None of these
No member explanations yet for this option.