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Q1
:
397 x 397 + 104 x 104 + 2 x 397 x 104 = ?
A
261001
B
260101
C
251001
D
250001
Solution
ANS:
B
- 251001
Given Exp.
= (397)
2
+ (104)
2
+ 2 x 397 x 104
= (397 + 104)
2
= (501)
2
= (500 + 1)
2
= (500
2
) + (1)
2
+ (2 x 500 x 1)
= 250000 + 1 + 1000
= 251001
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