Solve:-
666 x 666 x 666 + 555 x 555 x 555 = ?(666 x 666 - 666 x 555 + 555 x 555)	Choose the correct choice from the following choices:
A) 888 B) 333 C) 555 D) 1221 E) 889

Rationale: given exp . = ( a 3 + b 3 ) = ( a + b ) = ( 666 + 555 ) = 1221 ( a 2 - ab + b 2 ) answer d
Answer: D