Factorise $x^3+y^3$x3+y3.
Factorise $x^3-y^3$x3−y3.
Factorise $x^3+27$x3+27.
Factorise $x^3-64$x3−64.
Identities (a ± b)^2 = a^2 ± 2ab + b^2, a^2 – b^2 = (a – b) (a + b) Factorisation (simple cases only) as examples the following types a(x + y), (x ± y)^2, a^2 – b^2, (x + a).(x + b)