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Question
Evaluate the following :
(8.12)3 - (3.12)3
Sum
Solution
(8.12)3 - (3.12)3
= (8.12 - 3.12)3 + 3(8.12)(3.12)(8.12 - 3.12)
= 53 + 3(8.12)(3.12) x 5
= 125 + 15 x (8.12)(3.12)
= 125 + 15 x 25.3344
= 125 + 380.016
= 505.016.
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