Explications étape par étape:
V = (14-17 / (15-12)
= (-3) / 3
= -1
W = 2- (-3-6)/18 = 2- (-9)/18
= 2- (-1/2)
= 2+1/2
= 4/2 +1/2
= 5/2
Y = ((-2)×(-3)) / (-2-3)
= 6 / (-5)
= -6/5
Z = ((-7)×8+6) / (-10-(-2)×10)
= (-56+6) / (-10-(-20))
= -50 / (-10+20)
= -50 / 10
= -5
