hooked up my phone to my computer to charge and update, now photos from my computer are on the phone, have been unable to delete them from the phone, how can I delete them? No my phones memory is almost full.

First, you may want to prevent your phone from syncing automatically in the future when connected to iTunes. To do that you go to Preferences in iTunes, click Devices at the top of the Preferences window, and then select "Prevent iPos, iPhones, and iPads from syncing automatically."

To remove the synced photos from the phone, you use iTunes and follow the instructions below which I copied from Sync photos to your iPhone, iPad, and iPod touch in iTunes - Apple Support

Delete synced photos

1. In iTunes, locate and click on your device.
2. Click Photos.
3. Choose "Selected albums" and deselect the albums or collections you want to delete.
   To delete all synced photos, deselect "Sync Photos from" and, when asked, click "Remove photos."
4. Click Apply.

Learn how to delete photos and video synced from iTunes when you can't access the originals.