can you use a 4k and a normal monitor simeltaniously

[vandalizing9]

i was wondering if i could have a normal benq monitor next to a 4k monitor which i would game on.
like could i dualscreen like before

 

[flamefire999]

You should have no issues. What GPU do you have? If your GPU isn't good enough then you won't get playable frame rates at 4k.