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Question
Evaluate the following :
(3.29)3 + (6.71)3
Sum
Solution
(3.29)3 + (6.71)3
= (3.29 + 6.71)3 - 3(3.29) (6.71) (3.029 + 6.71)
= (10)3 - 3(3.29) (6.71) (10)
= 1000 - 30 (5 - 1.71) (5 + 1.71)
= 1000 - 30 (5)2 - (1.71)2
= 1000 - 30 (25 - 2.9241)
= 1000 - 30 x 22.0759
= 1000 - 662.277
= 337.723.
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