Réponse :
Explications étape par étape
Bonjour
A = 3 + 2/7
A = (3 x 7)/7 + 2/7
A = 21/7 + 2/7
A = 23/7
B = 2/5 - 4/3
B = (2 x 3)/(5 x 3) - (4 x 5)/(3 x 5)
B = 6/15 - 20/15
B = (-14/15)
C = 55/18 x 24/44
C = 55/44 x 24/18
C = (5 x 11)/(4 x 11) x (6 x 4)/(6 x 3)
C = 5/4 x 4/3
C = 5/3 x 4/4
C = 5/3
D = 14/45 : 21/25
D = 14/45 x 25/21
D = 14/21 x 25/45
D = (2 x 7)/(3 x 7) x (5 x 5)/(9 x 5)
D = 2/3 x 5/9
D = 10/27
E = 2/7 + 3/7 x 21/15
E = 2/7 + 21/7 x 3/15
E = 2/7 + (3 x 7)/7 x 3/(3 x 5)
E = 2/7 + 3 x 1/5
E = 2/7 + 3/5
E = (2 x 5)/(7 x 5) + (3 x 7)/(5 x 7)
E = 10/35 + 21/35
E = 31/35
F = 3 - 5/3 : 25/12
F = 3 - 5/3 x 12/25
F = 3 - 12/3 x 5/25
F = 3 - 4 x 1/5
F = 3 - 4/5
F = 15/5 - 4/5
F = 11/5
G = (2/3)^3 x (4 + 5)/4
G = 8/27 x 9/4
G = 9/27 x 8/4
G = 1/3 x 2
G = 2/3
H = [-2^2 + 2 x (1 - 3)^2] / (2V2)^2
H = (-4 + 2 x (-2)^2) / (4 x 2)
H = (-4 + 2 x 4) / 8
H = (-4 + 8) / 8
H = 4/8
H = 1/2
I = -2 / (2/3 - 3/2)
I = -2/(4/6 - 9/6)
I = -2/(-5/6)
I = -2 x -6/5
I = 12/5
K = 2 - 1/(1/3 - 2/5)
K = 2 - 1/(5/15 - 6/15)
K = 2 - 1/(-1/15)
K = 2 + 1/15
K = 30/15 + 1/15
K = 31/15
L = (1 - 7/2)(2 + 5/3)
L = (2/2 - 7/2)(6/3 + 5/3)
L = (-5/2)(11/3)
L = -55/6
