397 × 397 + 104 × 104 + 2 × 397 × 104 = ?
A. 250001
B. 251001
C. 260101
D. 261001
Answer: Option B
Solution (By Examveda Team)
Given expression,= (397)2 + (104)2 + 2 × 397 × 104
= (397 + 104)2
= (501)2
= (500 + 1)2
= (500)2 + 12 + 2 × 500 × 1
= 250000 + 1 + 1000
= 251001
This Question Belongs to Arithmetic Ability >> Number System
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