Bonjour,
D=-2×(5-2×3)-3
= -10+12-3
= -1
Bjr
D = -2×(5-2×3)-3
D = -2×(5-6)-3
D = -2×(-1)-3
D = -2×-1-3
D = 2-3
D = -1
Voilà !
