The sum of the squares of three numbers is 138, and the sum of their products, taken two at a time, is 15. What is the sum of the three numbers?
Q1. The sum of the squares of three numbers is 138, and the sum of their products, taken two at a time, is 15. What is the sum of the three numbers?
Answer: √168
Explanation: The correct value is √168. Apply the formula or arithmetic step shown in the question and