Question

a² + b² = 34, ab= 15 ആയാൽ a + b എത്ര?

• A. 64
• B. 49
• C. 8
• D. 7

Answer 1

Answer:

C. 8

a² + b² = 34, ab= 15 (a + b)² = a² + b² + 2ab = 34 + 2 × 15 = 34 + 30 = 64 a + b = √64 = 8