Question

without actually calculating the cubes, find the value of each of the following. (28)cube+(-15) cube+(-13) cube​

Answer 1

We have to find the value :

=>  (28)³ + (–15)³ + (-13)³

Let -» a = 28

b -» -15

c -» -13

=> a + b + c = 0

If -» a + b + c = 0. Then a³ + b³ + c³ = 3abc

→ 28)³+ (–15)³ + (-13)³ = 3(28)(-15)(-13) = 16380

→ (28)³+ (–15)³ + (-13)³ = 16380

Answer = 16380

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