Question

difference of two perfect cube is 387.if the cube root of the greater of two numbers is 8,find the cube root of the smaller one.

Answer 1

Cube root is 8 so the no will be 512
Now difference is 387 therefore the second perfect cube is 512-387=125 thus cube root of smaller one is 5

Answer 2

Let the no.s be x and y were x> y
X^3 - y^3 = 387 . X= 8 then y^3 = 387-8^3 = 387-512 =-125 .
Y=-5.