bjr

d = √5/√36 + 2√20/√9 = √5/6 + 2√(4x5)/3 = √5/6 + 4√5/3

= √5/6 + 8√5/6 = 9√5/6 = 3√5/2

e = √14/√3 x √3x√8 = √14/√8 = √14/2√2 = √7x√2/2√2 = √7/2 = 1/2√7

je bloque pour le f