Suppose we want to factorise,
Β 2 x y + 3 x + 2y + 3
Β
We note that,
Β Β 2xy & 2y both have 2
And
Β 3x & 3 both have 3
Β
So, we put them together
Β
Β (2xy + 2y) + (3π₯ + 3)
Β
So,
Β 2π₯y + 3π₯ + 2y + 3 = (π₯ + 1) (2y + 3)
Β
Factorise 4ab β 5a β 12b + 15