a2 + b2 = ?

a² + b² = ?

A (a²+b²)+2ab

B (a – b)² + 2ab

C (a²+b²)+4ab

D (a²+b²)-4ab

Solution

Correct Answer: Option B

অনুসিদ্ধান্ত 1| a2 + b2 = (a + b)2 – 2ab

অনুসিদ্ধান্ত 2| a2 + b2 = (a – b)2 + 2ab