Question

find the volume of a cube whose side length is 5x^2

Answer 1

If the side length is 5 x 2, 5 x 2 = 10, so 10 x 3 is 30.  Hope this helped!

Answer 2

V = s³
V = (5x²)³
V = (5x²)(5x²)(5x²)
V = 5x²+²+²
V = 5x^6