Réponse :
Explications étape par étape
Bonjour
calculer
M= -1/2 + 7/4 x 5/9
M = -1/2 + 35/36
M = (-1 x 18)/(2 x 18) + 35/36
M = -18/36 + 35/36
M = 17/36
N= -5/3 x (-4/7 - -9/28)
N = -5/3 x (-4/7 + 9/28)
N = -5/3 x [(-4 x 4)/(7 x 4) + 9/28]
N = -5/3 x (-16/28 + 9/28)
N = -5/3 x -7/28
N = 5/3 x 7/(7 x 4)
N = 5/3 x 1/4
N = 5/12
P= (2/7 - 3/14) x (-5/6 - 2/9)
P = [(2 x 2)/(7 x 2) - 3/14][(-5 x 3)/(6 x 3) - (2 x 2)/(9 x 2)]
P = (4/14 - 3/14)(-15/18 - 4/18)
P = 1/14 x -19/18
P = -19/252
