Réponse :
bonjour
M = a + bc
M = 3/2 + (- 3x 1/6 )
M = 3/2 - 3 /6
M = 9/6 - 3/6 = 6/6 = 1
N = (a - c) : b
N = ( 3/2 - 1/6 ) : - 3
N = ( 9/6 - 1 /6 ) : 3
N = 8 /6 x 1 /3
N = 8/18 = 4/ 9
P = a x ( b : c )
P = 3/2 x ( - 3 x 6 )
P = 3/2 x - 18
P = - 54 /2 = - 27
Explications étape par étape :