Question

Q6 Without actually calculating the cubes, evaluate:-
30 cube + 20 cube -50 cube
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Answer 1

Answer:

0 cube . Hope it helps . take care have a good day

Answer 2

given,

(30³+20³)-50³

it is in the form of a³+b³, which is equal to (a+b)³-3ab(a+b)

=(30+20)³-3*30*20*(30+20)-50³

=50³-1800(50)-50³

=-1800(50)

=-90000.

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