Question

evaluate cube of 999

Answer 1

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(999)3 = (1000 - 1)3

(a - b)3 = a3 - b3 - 3a2b + 3ab2

(999)3 = (1000)3 - (1)3 - 3 (1000)2 1 + 3 1000 12

= 1000000000 - 1 - 3000000 + 3000.

= 997000000 + 3000 - 1

= 997002999.

Answer 2

Answer:

the cube of 999=997002999