Question

13) without actually calculating cubes, find the value of a) (-1)³+(-2)³+(-3) ³+ (-4)³+2(5)³​

Answer 1

Step-by-step explanation:

We know that,

If (a+b+c)=0, then a

3

+b

3

+c

3

=3abc

Here, 28+(−15)+(−13)=0

∴(28)

3

+(−15)

3

+(−13)

3

=3(28)(−15)(−13)=16380