7.3 - Special Factoring

Difference of Squares:
x^2 - y^2 = (x + y) (x - y)
Perfect Square:
x^2 +2xy + y^2 = (x + y)^2
x^2 - 2xy + y^2 = (x - y)^2
Difference of Cubes:
x^3 - y^3 = (x + y)(x^2 + xy + y^2)
Sum of Cubes:
x^3 + y^3 = (x + y)(x^2 -xy +y^2)