With footnotes, it's more than doable. Perhaps not really for people who haven't read much in French yet, though. But odds are the English translation is worth reading, too - or better yet, an actual stage version of the plays, either Andromaque or Phèdre, although I think the former is played rather more often. I had seen a play based on Racine's Andromaque a number of years earlier, which certainly helped in making me want to read the original version.