Factorise the following expression:121b2 - 88bc + 16c2
Factorise the following expression:(l+m)2 - 4lm
Factorise the following expression:
Factorise:
Factorise:(l + m)2 - (l-m)2
Factorise:9x2y2 - 16
Factorise:(x2 - 2xy + y2) - z2