Question

find the value of ..​

Answer 1

Let's check if the sum of these numbers is 0.

28-15-13=28-28=0.

The sum is zero.

We know that,

${a}^{3} + {b}^{3} + {b}^{3} = 3abc \: \: \: \: | \: \: if \: a + b + c = 0$

$\\ So, \: {28}^{3} + {( - 15)}^{3} + {( - 13)}^{3} \\ = 3 \times 28 \times ( - 15) \times ( - 13) \\ = \boxed{\huge{16380}}$