First one looks like Melilotus

Second appears to be an Epilobium of some type.

Here is a link that might be useful: Melilotus albus

Yes, #2 is an Epilobium. Pull & discard before the seeds fly everywhere.

First one is white sweet clover. Great green manure, biennial, fixes its own nitrogen and has a very nice smell. Makes a terrible weed, though not as much a problem in a garden setting as it is easy to chop out the first year. Otherwise, prevent seed production and it will quickly disappear.