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प्रश्न
Evaluate using the expansion of (a + b)2 or (a – b)2 :
(92)2
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उत्तर
(92)2 = (100 − 8)2
= (100)2 + (8)2 − 2(100) (8)
= 10000 + 64 − 1600
= 10064 − 1600
= 8464
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