You don't *know* for sure until you try. Manufacturers will usually exempt themselves from service claims by advertising less compatibility than more, so even if your DVD player does not explicitly say it's compatible, it may be. May also not be.
I've had really old Toshiba DVD players read all my DVD+Rs, but my friend's newer GoVideo DVD player can't read the same discs.
It also helps compatibility if you "book-type" your DVD.