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Expand using appropriate identities:(98)2 |
Answer» (98)2 = (100 – 2)2 Comparing (100 – 2)2 with (a – b)2 we get (a – b)2 = a2 – 2ab + b2 (100 – 2)2 = 1002 – 2(100)(2) + 22 = 10000 – 400 + 4 = 9600 + 4 = 9604 |
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