Formal:
* A et B: This is the most direct translation and is suitable for formal writing or speech.
* A ainsi que B: This is another formal option meaning "A as well as B."
Informal:
* A et B aussi: This is a more casual way of saying "A and B too."
* A et B tout les deux: This means "A and B both."
* Les deux, A et B: This means "both, A and B."
Examples:
* Formal: J'aime le café et le thé. (I like both coffee and tea.)
* Informal: J'ai visité Paris et Rome aussi. (I visited both Paris and Rome.)
* Formal: Le chat et le chien sont des animaux domestiques. (Both the cat and the dog are domestic animals.)
* Informal: Les deux, le français et l'anglais, sont des langues importantes. (Both French and English are important languages.)
The best choice will depend on the specific situation and the level of formality required.