Question

Factor completely 4x^2-4x+2xy-2y

Answer 1

with these you need to group factor. you factor the first 2 together then the 2nd 2 and combine.

4x(x-1)+2y(x-1)

now since you have (x-1) in both you can combine (4x+2y)

(4x+2y)+(x-1)

answer is
2(2x+y)+(x-1)

Answer 2

hope this helps