Réponse :
bonjour
Explications étape par étape :
X = (-3.2) × (-10) × (+ 2) × (-0.5)
=32 x -1
=-32
Y = (-3) × (-0,1) × (+ 5) x (+4)
=-60 x -0.1 =
=6
Z = (+2) × (-10) × (+ 3) × (-1) × (-1)
=-60 x1
=-60
A = (-75) × (-0,25) × (+4) × (+2)
=4x -0.25 x -75 x2
-1 x-75 x2
=150
B = (-1,5) x (+4) × (-1) × (+ 0.8) × (-3)
-1 x -6 x0.8x-3
= -14.4