SOLUTION: Find the non-zero values of a and b for which (2x-a)^3 = 8x^3 - bx^2 + 3/2bx - a^3.

That must be true for all values of x, so let's let x = a/2 to
make the left side zero.









Multiply through by 4





Divide both sides by ab

 and b can be any non-zero number.

Edwin