9q2 - 18q + 9 =
(3q + 3)(3q + 3)
(3q + 3)
(3q - 3)(3q + 3)
(3q - 3)(3q - 3)
9q2 - 18q + 9 = (3q)2 - 2(3q)(3) + 32 = (3q - 3)2
= (3q - 3)(3q - 3)
(4pq+3q)2 − (4pq−3q)2= ____________.
Factorise the following :
(p−3q)3+(3q−7r)3+(7r−p)3