397 × 397 + 104 × 104 + 2 × 397 × 104 = ?

A. 250001

B. 251001

C. 260101

D. 261001

E. None of these

Answer: Option B

Solution(By Examveda Team)

Given Exp.
= (397)² + (104)² + 2 × 397 × 104
= (397 + 104)²
= (501)² = (500 + 1)²
= (500²) + (1)² + (2 × 500 × 1)
= 250000 + 1 + 1000
= 251001