How do you factor 4x - x^2 - 4y + xy completely?
1 Answer
Oct 7, 2016
Explanation:
Factorise by
color(blue)"grouping the terms" as follows.
[4x-x^2]+[-4y+xy] now factorise each group.
rArrcolor(red)(x)color(blue)((4-x))color(red)(-y)color(blue)((4-x)) We now have a common factor of (4 - x).
rArrcolor(blue)((4-x))color(red)((x-y))
rArr4x-x^2-4y+xy=(4-x)(x-y)
