Find here the formula for finding the difference between two cubes. It would be easier for you to remember the formula for difference between 2 cubes. By just keeping in mind that for the difference of cubes, the "minus" sign goes with the linear factor, a – b and for the sum of cubes, the "minus" sign goes in the quadratic factor, a² – ab + b². Make use of this Difference of Two Cubes formula, which would help you in algebraic calculations.