Réponses

2014-10-25T20:47:16+02:00
Bonsoir

D = 6√7 - 8√7 = - 2√7

E = 4 √5 + 2√20 = 4√5 + 2√5x2²
E + 4√5 + 4√5 + 8√5

F = - 2√8 + 3√50 - 7√18
F = -2√ 2 x 2² + 3√2 x 5² - 7√2 x 3²
F = - 4√2 + 15√2 - 21√2
f = -10√2