Bonjour, svpp aider moi je comprend rien.. merci d'avance

Racine 8 = racine 4x2 = 2 racine 2
Racine 18 = racine 9x2 = 3 racine 2
Racine 50 = racine 25x2 = 5 racine 2
Racine 162 = racine 81x2 = 9 racine 2
Racine 288 = racine 144x2 = 12 racine 2