Résoudre ces équations : A = (x + 5)² + (x + 5)(x - 1) = 0 B = (x + 1)(5x - 1) - (x + 1)(3x - 12) = 0
Mathématiques
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Question
Résoudre ces équations :
A = (x + 5)² + (x + 5)(x - 1) = 0
B = (x + 1)(5x - 1) - (x + 1)(3x - 12) = 0
A = (x + 5)² + (x + 5)(x - 1) = 0
B = (x + 1)(5x - 1) - (x + 1)(3x - 12) = 0
2 Réponse
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1. Réponse nonotata
A = (x + 5)² + (x + 5)(x - 1) = 0
a =(x+5)(x+5+x-1) =0
(x+5)(2x+4) =0
x+5 =0 2x+4 =0
x = -5 x =4/2 =2
solution (-5; 2)
B = (x + 1)(5x - 1) - (x + 1)(3x - 12) = 0(x+1)(5x-1-3x+12)=0
(x+1)(2x+11) =0
x+1 =0 2x+11 =0
x = -1 x = -11/2
solution (-1, -11/2)
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2. Réponse lamarocainemrk
A: (x+5)(x+5+x-1)=0
(x+5)(2x+4)=0
x+5=0 ou 2x+4=0
x=-5 ou x= -4/2
x=-5 ou x=-2
S:(-5;-2)
B:(x+1)(5x-1-3x+12)=0
(x+1)(2x+11)=0
x+1=0 ou 2x+11=0
x=-1 ou x= -11/2
S:(-1;-11/2)