Answer:
16- 16x + 4x^2 + xy -2y
Assuming that there is no other information given on this expression. It is not an equation, since it is not set equal to something. The only thing I can see to do is to expand the (2x-x)^2 term.
Explanation:
4(2-x)^2+xy-2y
(2-x)^2 = (2-x)(2-x)
= 4 - 4x +x^2
4(4 - 4x +x^2)+xy-2y
16- 16x + 4x^2 + xy -2y