Question

without actually calculating the cubes find the value of the each of the following 28 whole cube + - 15 whole cube + - 13 whole cube​

Answer 1

Answer:

16380

Explanation :

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We know that

If a+b+c=0 then

a³+b³+c³=3abc

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Here ,

a=28 , b = -15, c=-13

a+b+c=28-15-13 = 0

Now ,

a³+b³+c³

= (28)³+(-15)³+(-13)³

= 3abc

= 3(28)(-15)(-13)

= 16380

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