Recommended requirements help

[Mehweweh]

Whether or not you have space to install a separate graphics card depends on the laptop though. Can you give us the model/brand information?

I have a Lenovo G50-70

[Sagittarian]

I have a Lenovo G50-70

It looks like some versions of that model come with an AMD Radeon R5-M230 2GB GPU installed alongside the Intel graphics. If you have one of those it may just be a matter of making sure the drivers are installed and it is available to use. It probably would have been advertised with "2GB Graphics" if it has one of those cards.
If it doesn't have the AMD card already installed it *may* be possible to add it (since some models do come with it) but it's probably not something you want to do yourself. You could try asking Lenovo or a local computer shop.

And as elemental10 said, you can play with low/standard scores but you'll probably want to turn down the graphics settings and some fights will still be painful.

[Mehweweh]

And as elemental10 said, you can play with low/standard scores but you'll probably want to turn down the graphics settings and some fights will still be painful.

Is that with or without an AMD Radeon R5-M230 2GB GPU installed?

[Sagittarian]

Is that with or without an AMD Radeon R5-M230 2GB GPU installed?

Without.
I just upgraded my desktop for Heavensward. I had been using an all-in-one with lower specs than your laptop - I think it managed to score 2400 on the benchmark with the lowest possible graphics settings. It got me through all of ARR but there were certain graphics intensive fights that I didn't feel I could participate well in due to the computer taking too long to actually display the attack telegraphs: notably Titan HM, all the extreme primals, and certain levels in the Binding Coil of Bahamut. The kicker for me was that at this scene in the benchmark it wouldn't actually display the dragon being hit by the summoner's spell even with minimal graphics settings.