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Q1
:
287 x 287 + 269 x 269 - 2 x 287 x 269 = ?
A
446
B
324
C
None of these
D
354
E
534
Solution
ANS:
D
- 324
Given Exp.
=
a
2
+
b
2
- 2
ab
, where
a
= 287 and
b
= 269
= (
a
-
b
)
2
= (287 - 269)
2
= (18
2
)
= 324
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