Réponses

2014-10-28T13:34:22+01:00
Bonjour

A = ( 1/2  - 3/5)²
A =  (1/2)² - 2((3/10) + (3/5)²
A = 1/4 - 6/10 + 9/25
A = 25/100 - 60/100 + 36/100
A = 1/100

B = (√5 + 4)²
B = 5 + 8√5 + 16
B = 21 + 8√5

c = ( 5 + 3/2)²
C = 25 + 30/2 + 9/4
C = 100/4 + 60/4 + 9/4
c = 169/4

D = (√3 + √7)²
D = 3 + 2√21 + 49
D = 52 + 2√21