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Evaluate (998)3 using suitble identities?

Answer» 998=1000-2998³=(1000-2)³,which is in the form of (a-b) ³(a-b) ³=a³-b³-3ab(a-b)that implies, 1000³-2³-3*1000*2(1000-2)=1000000000-8-6000(998)=1000000000-5988000-8=994011992therefore, 998³=994011992


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