Réponse :
A=5x-3(x+12)=5x-3×x+3×12=5x+3x+36=8x+36
B=3x-6+7(2x+4)=3x-6+7×2x+7×4=3x-6+14x+28=17x+22
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Réponse :
A=5x-3(x+12)=5x-3×x+3×12=5x+3x+36=8x+36
B=3x-6+7(2x+4)=3x-6+7×2x+7×4=3x-6+14x+28=17x+22
B=3x-6+7*2x+7*4=3x-6+14x+28=17x-22