Answer: 4xy

Step-by-step explanation:

2xy - -2xy= 2 - -2= 4

babalik dun sa rule of adding an integers so yung 2 is e-kekeep habang yung - magiging + kc e-swiswitch, and yung -2 magiging +2 kasi opposite ng - is +, and magiging:

2 + 2= 4xy

Another explanation:

Combine Like Terms:

=2xy+2xy

=(2xy+2xy)

=4xy

Answer:

=4xy