Exercice 2 :
(v/ = racine carrée)
A= 2v/45 - 3v/5 + v/20
A= 2v/5x9 - 3v/5 + v/5x4
A= 2+3v/5 - 3v/5 + 2v/5
A= 5v/5 - 3v/5 + 2v/5
A= 4v/5
B= 2v/27 + v/18 x v/6
B= 2v/3x9 + v/2x9 x v/6
B= 2+3v/3 + 3v/2x6
B= 5v/3 + 3v/3x4
B= 5v/3 + 5v/3
B= 10v/3
C= (v/2 - 4)(2 + 4v/2)
C= 2v/2 + 4v/4 - 8 - 16v/2
C= 2v/2 - 16v/2 + 6 - 8
C= 14v/2 - 2
D= 2v/28 + 5v/63 - 3v/112
D= 2v/4x7 + 5v/9x7 - 3v/16x7
D= 2+2v/7 + 5+3v/7 - 3+4v/7
B= 4v/7 + 8v/7 - 7v/7
B = 5v/7
