See p. 26. There is a slot. It takes DDR4-2666 SO-DIMM but the motherboard will restrict the speed to 1866 and it is single channel. Officially, 4 gb is the maximum and I cannot be sure of this but a lot of experience with these things tells me 8 gb should work. You have an A4 processor which I think would benefit from 8 gb. Sorry I cannot give you any guaranty. If you try it and are successful please let us know or if you are not successful. Thanks.
Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".