Consider the question. Solve:-
666 x 666 x 666 + 555 x 555 x 555 = ?(666 x 666 - 666 x 555 + 555 x 555)
Options:
(A) 888
(B) 333
(C) 555
(D) 1221
(E) 889
If the answer is '(D)'; explain the reasoning:
Given Exp. = (a3 + b3) = (a + b) = (666 + 555) = 1221(a2 - ab + b2)