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Question
Use identities to evaluate : (502)2
Sum
Solution
(502)2
(502)2 = (500 + 2)2
We know that,
( a + b )2 = a2 + b2 + 2ab
∴ ( 500 + 2 )2 = 5002 + 22 + 2 x 500 x 2
= 250000 + 4 + 2000
= 2,52,004
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