Question

without actual calculating the cubes find the value of (28)3+(-15)3+(-13)3

Answer 1

Answer: the answer is 16380. see explanation.

Step-by-step explanation:

Here

(28)^3+(-15)^3+(-13)^3

We know,

(a+b+c)=0 and (a^3+b^3+c^3)=3abc

then,

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

simply,

(28^3+(-15^3)+(-13^3))=3*28*(-15)*(-13)

                                  =16380

hope it helps