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प्रश्न
Use identities to evaluate : (998)2
उत्तर
(998)2
(998)2 = (1000 - 2)2
We know that
( a - b )2 = a2 + b2 - 2ab
∴ (1000 - 2)2 = 10002 + 22 - 2 x 1000 x 2
= 1000000 + 4 - 4000
= 9,96,004
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