Question

factorise 3ax-6ay+8by-4ab
and answer must be (3x-4b) (a-2y)

Answer 1

3ax - 6xy + 8by - 4ab
=(3ax - 6xy) (8by - 4ab)
=3x(a - 2y) -4b(-2y +a)
=(a - 2y) (3x - 4b)

Answer 2

3ax-4ab-6ay+8by
a(3x-4b)-2y(3a-4b)
(3x-4b)(a-2y)