Q. If a(a + b + c) = 45, b(a + b + c) = 75 and c(a + b + c) = 105, then what is the value of (a2 + b2 + c2 )?
A) 83
B) 75
C) 225
D) 217
✔ Correct Answer: 83
Exam Insight
Using the given relationships and solving for a, b, and c, the value of a² + b² + c² is derived by substituting and simplifying.