laptop to ultrawide

[guivauthey01]

I was wondering if I could use the HDMI port on my laptop to connect with the alienware ultrawide "aw34" with his hdmi 1.4 port ?
will I get the 21/9 aspect ratio even through hdmi?

 

[guivauthey01]

MERGED QUESTION
Question from guivauthey01 : "laptop to ultrawide"

I was wondering if I could use the HDMI port on my laptop to connect with the alienware ultrawide "aw34" with his hdmi 1.4 port ?
will I get the 21/9 aspect ratio even through hdmi?