evaluate the fallowing using suitable identities (998)3cube
Answers
Answered by
2
Answer:
Step-by-step explanation:
998=1000-2
998³=(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
=994011992
therefore, 998³=994011992
Answered by
0
Step-by-step explanation:
998=1000-2
998³=(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
=994011992
therefore, 998³=994011992
Similar questions