40. Without actually calculating the cubes, evaluate:
(i) (21) - (12) - (9)
(ii) (9)3 + (11)3 - (20)3
(iii) (3.0)3 - (1.8) 3 (1.2)
Answers
Answered by
3
Answer:
1.... a³+b³+c³-3abc=0
a3+b3+c3=3abc
21³+(-12³)+(-9³)= 3*21*(-12)*(-9)
= 6804
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Answered by
1
Answer:
a+b+c= 0
Then a^3+ b^3+c^3 =3abc
1)827
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