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Sagot :

Réponse :

*=multiplié

a) 2*x+2*5 = 2x+10

b) 7*2-7*3x = 14-21x

c) 4x*5+4x*x = 20x+4x²

d) -2*7-(-2)*2x = -14+4x

e) 5x*3x+5x*4 = 15x²+20x

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