I need to completely factorise this
8x – 4y + 2x – y
I would have collected the like terms 8x + 2x and -4y - y
Which would give me 10x - 5y
Then I would factorise that
So I would get 5(2x-1y)
However on the markscheme it says
(2x – y)(4x + 1)
Which I think is wrong.
Am I right