The first easy way to delete an account on Facebook is to follow the link:
https://www.facebook.com/help/contact.php?show_form=delete_account
click on the button “Delete my account”, in the next window that appears enter the password from the page, the symbols with the CAPTCHA and click “OK”.
If everything is entered correctly, a message will appear with the text “Your account has been deactivated from the site and will be permanently deleted within 14 days, during which time you will be able to restore your profile.”
Help on Facebook:
https://www.facebook.com/help/223786757631885