Q. 115.0( 4 Votes )

If <img wid A. -1

B. -3

C. -2

D. 0

Answer :

It is given in the question that,



a2 + b2 = - ab


a2 + b2 + ab = 0 (i)


We know that,


a3 – b3 = (a – b) (a2 + b2 + ab)


From (i), we have a2 + b2 + ab = 0


a3 – b3 = (a – b) × 0


a3 – b3 = 0


Hence, option D is correct

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