Question

Please do mention the identity which we need to use too ... thanks ​

Answer 1

The given question is,
(0.2)^3 - (0.3)^3 + (0.1)^3
= (0.2)^3 + (-0.3)^3 + (0.1)^3
Now, if we look carefully

0.2+(-0.3)+(0.1) = 0
So, we can apply the identity
a^3 + b^3 + c^3 = 3abc
So,

(0.2)^3 + (-0.3)^3 + (0.1)^3 = 3*(0.2)(-0.3)(0.1)

Hope this helps you !

Answer 2

hope this answer is helpful