Nom et prénom : DM (à rendre le lundi 02/01/2023) Classe: Exercice 1 3pts Développe et réduis si possible les expressions suivantes A = 5(3x - 4) B = 3(7-a) C = (x + 2) (x + 3) D = (x - 5)(x + 1)
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mathseone0
A = 5*3x + 5*(-4) A = 15x + (-20) A = 15x - 20
B = 3*7 + 3* (-a) B= 21 + (-3a) B= 21 - 3a
C = x*x + x* 3 + 2*x + 2*3 C = x2 ( au carré ) + 3x + 2x + 6 C = x2 + 5x + 6
D = x*x + x*1 + (-5)*x + (-5)*1 D = x2 + 1x + (-5)x + (-5) D = x2 - 4x - 5
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A = 15x + (-20)
A = 15x - 20
B = 3*7 + 3* (-a)
B= 21 + (-3a)
B= 21 - 3a
C = x*x + x* 3 + 2*x + 2*3
C = x2 ( au carré ) + 3x + 2x + 6
C = x2 + 5x + 6
D = x*x + x*1 + (-5)*x + (-5)*1
D = x2 + 1x + (-5)x + (-5)
D = x2 - 4x - 5