Réduire chaque expression
a) 7x+3+5x+6 b) -4y+9-5y-7
c) 8a-9-12a+3 d) 15b²+3b-9b²-5
a) 7x+3+5x+6 b) -4y+9-5y-7
c) 8a-9-12a+3 d) 15b²+3b-9b²-5
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b) -9y+2
c)-4a-6
d)6b²+3b-5
Pour moi je pense que c'est sa
b) -4y+9-5y-7 =-9y+2
c) 8a-9-12a+3 =-4a-6
d) 15b²+3b-9b²-5 = 6b²+3b-5