Use (a - b)2 = a2 - 2ab + b2 to evaluate the following:
(997)2
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(997)2 = (1000 - 3)2
Using (a - b)2 = a2 - 2ab + b2,
(1000 - 3)2 = (1000)2 - 2(1000)(3) + (3)2
= 1000000 - 6000 + 9 = 994009
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Use (a+b)2 = a2 + 2ab + b2 to evaluate the following:
(10.2)2
(99)2
(9.8)2
By using suitable identities, evaluate the following:
(103)3