Difference of Cubes  -  An expression of the form a³ - b³. The difference of two cubes factors into (a - b)(a² + ab + b²).

Roots  -  The solutions to y = f (x) when y = 0.

Sum of Cubes  -  An expression of the form a³ + b³. The sum of two cubes factors into (a + b)(a² - ab + b²).