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Q1
:
(469 + 174)
2
- (469 - 174)
2
= ?
(469 x 174)
A
295
B
643
C
4
D
2
Solution
ANS:
B
- 4
Given exp. =
(
a
+
b
)
2
- (
a
-
b
)
2
ab
=
4
ab
ab
= 4 (where
a
= 469,
b
= 174.)
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