Réponse :
Explications étape par étape
Bonjour
M = 7/8 - 1/12
M = (7 x 3)/(8 x 3) - (1 x 2)/(12 x 2)
M = 21/24 - 2/24
M = 19/24
N = -4/9 + 5/12
N = (-4 x 4)/(9 x 4) + (5 x 3)/(12 x 3)
N = -16/36 + 15/36
N = -1/36
P = -7/6 - 5/3 + 2/9
P = (-7 x 3)/(6 x 3) - (5 x 6)/(3 x 6) + (2 x 2)/(9 x 2)
P = -21/18 - 30/18 + 4/18
P = -47/18
Q = (4/3 + 2/15) - (3/4 - 1/8)
Q = [(4 x 5)/(3 x 5) + 2/15] - [(3 x 2)/(4 x 2) - 1/8]
Q = 20/15 + 2/15 - 6/8 + 1/8
Q = 22/15 - 5/8
Q = 176/120 - 75/120
Q = 101/120
