Factor $x^3+y^3$x3+y3.
Factor $x^3-y^3$x3−y3.
Factor $x^3+27$x3+27.
Factor $x^3-64$x3−64.
Use the structure of an expression to rewrite it in different equivalent forms. For example,see x^4 - y^4 as (x^2)^2 - (y^2)^2, thus recognizing it as a difference of squares that can be factored as (x^2 - y^2)(x^2 + y^2).