9. To evaluate 998 the best option is the expansion of
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Answer:
(a-b) ³=a³-b³-3ab(a-b)
Step-by-step explanation:
that implies, 1000³-2³-3*1000*2(1000-2)
=1000000000-8-6000(998)
=1000000000-5988000-8
=994011992
therefore, 998³=994011992
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