Bonjour,
Exercice 16 :
-3m+5p-1
a) -3*2+5*2-1=-6+10-1=3
b) -3*2+5*(-2)-1=-6-10-1=-17
c) -3*(-2)+5*2-1=6+10-1=15
d) -3*(-2)+5*(-2)-1=6-10-1=-5
Exercice 17(
a) (-3*2+6)(7-2)=(-6+6)(5)=0*5=0
b) (-3*7+6)(7-7)=(-21+6)(0)=0
d) (-3*(-5)+6)(7-(-5))=(15+6)(7+5)=21*12=252
e) (-3*12+6)(7-12)=(-36+6)(-5)=-30*(-5)=150
Bonsoir.