Question

Evaluate the following :
(5.45)³ + (3.55)³ 

Answer 1

(5.45)³ + (3.55)³ 
= (5.45 + 3.55)³ - 3(5.45)(3.55)(5.45 + 355)
= (9)³ - 3(4 + 1.45)(4 - 1.45)(9)
= 81 - 3(16 - (1.45)²)(9)
= 81 - 27(16 - 2.1025)
= 81 - 27 x 13.8975
= 81 - 522.3825
= 206.6175.