fmpsagara :
I wanted to play like 2k17 using a controller on one monitor and the other monitor uses the usual keyboard/mouse.
If this is your main reason, I wouldn't recommend it all since is not possible, as Phillip said.
Although, you will find other benefits in using multiple displays. Such as playing on one and use WhatsApp web, Facebook or whatever you want in the other one. Some games might feel a bit laggy if you don't have a powerful GPU since it needs to "keep" the desktop and a software running at the same time.
Anyway, I find it really useful. Currently I have a 144Hz as main display (gaming) and a 1080p secondary display (browser, etc.)