Factorise: (x+2)3+(x−2)3
ANSWER: (x+2)3+(x–2)3=(x+2+x−2)((x+2)2+(x−2)2−(x2−4))=2x(x2+4+4x+x2+4−4x−x2+4)=2x(x2+12)
Factorise: (x+2)3−(x−2)3
(x+2)3+(x−2)3