Bonjour pourriez vous m aide pr mn DM de Maths svp c'est urgent a résoudre svp 1)(x+1)+(5x-1) -(x+1)(3x-12)=0 2) 3(x-1)+2(x+3) 3)-5(x+2)+3(x-3)=7 4)9 x²+12x+4=
Mathématiques
jojo269
Question
Bonjour pourriez vous m aide pr mn DM de Maths svp c'est urgent a résoudre svp
1)(x+1)+(5x-1) -(x+1)(3x-12)=0
2) 3(x-1)+2(x+3)
3)-5(x+2)+3(x-3)=7
4)9 x²+12x+4=0
5)4x ²-4x+1=0
1)(x+1)+(5x-1) -(x+1)(3x-12)=0
2) 3(x-1)+2(x+3)
3)-5(x+2)+3(x-3)=7
4)9 x²+12x+4=0
5)4x ²-4x+1=0
1 Réponse
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1. Réponse nonotata
1)(x+1)+(5x-1) -(x+1)(3x-12)=0
(x+1)(5x+1-3x+12) =0
(x+1)(2x+13) =0
x+1 =0 2x+13 =0
x = -1 2x = -13
x = -13/2
2) 3(x-1)+2(x+3)
3x-3+2x+6
5x+3
5x =-3
x= -3/5
3)-5(x+2)+3(x-3)=7
-5x-10+3x-9 = 7
-2x-19 = 7
-2x = 7+19
-2x = 26
x= -26/2
x = -13
4)9 x²+12x+4=0
(3x+2)² =0
3x+2 =0
3x= -2
x= -2/3
5)4x ²-4x+1=0
(2x-1) =0
2x-1 =0
2x =1
x =1/2