Bonsoir pouvez vous m'aider à faire cette exercice svp

Réponse:

Exercice 09:

A=3(x+6)

=3x+18

B=5(6-y)

=30-5y

C=-7(2z-3)

=-14z+21

D=-8(-5-3y+2x)

=40+24y-16x

Exercice 11:

A=11+2(x-6)

=11+2x-12

=2x-1

B=-3(2y-4)-2y

=-6y+12-2y

=-8y+12

C=7-4(8-2a)+a

=7-32+8a+a

=-25+9a

D=-15-9(-5+3b)

=15+45-27b

=60-27b

E=-5(6-3z)-9+z

=-30+15z-9+z

=-39+16z

F=12x-4(6-3x)

=12x-24+12x

=24x-24

G=5t²+3(2t-3)-2t(t-5)

=5t²+6t-9-2t²+10t

=3t²+16t-9