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Sagot :

Réponse:

A=11+2(x-6)+4(-3x-6)

A=11+2x-12-12x-24

A=-25-10x

B=-2(x-5)-3(7-4x)

B=2x-10-21+12x

B=14x-31

C= 8+2y-5(2y-6)+4
=8+2y-10y+30+4
=-8y+42

D=-7y-4(3y-6)+3+2(3y-7)
=-7y-12y+24+3+6y-14
=-13y+13

E=-5z+5z(z-3)-7(6-8z)
=-5z+5z*2 -15z-42+57z
=5z*2+37z-42

(Le *2 c’est au carré)

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