Réponse :
Explications étape par étape :
a) rac32= = rac (16 X2) =rac (4²X 2) = 4rac2
b) rac75= = rac (25 X3) =rac( 5²X 3) = 5rac3
c) rac500= = rac (100 X5) =rac( 10²X 5) = 10rac5
d) rac80= = rac (16 X5) =rac( 4²X 5) = 4rac5
e) -rac48= = -rac (16 X3) =-rac( 4²X 3) =- 4rac3
f) 5rac18= = 5rac (9 X2)=5 rac(3²X 2) = 5X3rac2=15rac2
g) -4rac32= = -4rac (16 X2)=-4 rac(4²X 2) = -4X4rac2=-16rac2
