Q153
397 × 397 + 104 × 104 + 2 × 397 × 104 = ?
A.
250001
B.
251001
AnswerC.
260101
D.
261001
E.
None of these
Answer: Option B
Solution
Answer: Option B
Solution:
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