Q. 223.9( 29 Votes )

If , find the value of

Answer :

Concept Used:


(a + b)2 = a2 + b2 +2ab


(a – b)2 = a2 + b2 – 2ab
a3 – b3 = (a – b)(a2 + b2 + ab)


Explanation:






Now,





Now,



Hence, .


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