Question:
a² + b² = 34, ab= 15 ആയാൽ a + b എത്ര?
A64
B49
C8
D7
Answer:
C. 8
Explanation:
a² + b² = 34, ab= 15 (a + b)² = a² + b² + 2ab = 34 + 2 × 15 = 34 + 30 = 64 a + b = √64 = 8
Question:
A64
B49
C8
D7
Answer:
a² + b² = 34, ab= 15 (a + b)² = a² + b² + 2ab = 34 + 2 × 15 = 34 + 30 = 64 a + b = √64 = 8