If the sum and the product of two numbers are 8 and 15 respectively, find the sum of their cubes.

?[Note:Please do this question by a suitable equation and solution to be easily understand.]

Let first number be x and second number be y.
Given,
x + y = 8 and,
xy = 15
x and y are the factors of 15.
Factors of 15 are 1, 3, 5, 15.
    15 * 1 = 15
     5 * 3 = 15
We can see that 5 + 3 = 8
Therefore, x = 5 
                  y = 3
cube of 3 = 3 * 3 * 3 = 27
cube of 5 = 5 * 5 * 5 = 125
sum of 3 cube and 5 cube = 125 + 27 = 152