Réponses

2014-05-27T22:01:40+02:00
A =(2√3-5)²
A = 4x3-2x5x2√3+25
A = 12-20√3+25
A = 37+20√3

B = 3√5-2√180+5√45
B = 3√5-2√(6²x5)+5√(3²x5)           6² = 36 et 3² = 9
B =3√5-2x6√5+5x3√5
B = 3√5-12√5+15√5
B = 6√5