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Sagot :

Réponse :

Explications étape par étape

Bonjour,

Ce sont des équations produit nul, donc 2 solutions

(2x-1)(3x+4)=0

Soit: 2x-1 = 0 => 2x= 1 => x=1/2

ou : 3x+4 =0 => 3x= -4 => x= -4/3

(2/5x-1)(4x-5)=0

Soit :2x/5 -1 = 0 => 2x/5 =1 => 2x= 1*5 => x= 5/2

ou: 4x-5 = 0 => 4x=5 => x= 5/4

(x/5-2)(3x-1)=0

Soit: x/5 -2 = 0 => x/5 =2 => x= 2*5 => x=  10

Ou 3x-1 = 0 => 3x=1 => x=1/3

2x(4x-5)=0

Soit : 2x= 0 => x=0

ou: 4x-5 = 0 => 4x=5 => x= 5/4

Réponse :

=> (2x-1)(3x+4) = 0

(2x-1) = 0 => x = 1/2

(3x+4) =0 => x = - 4/3

=> (2/5x-1)(4x-5) = 0

(2/5x-1)=0 => x = 5/2

(4x-5) = 0 => x = 5/4

=> (x/5-2)(3x-1) = 0

(x/5-2) = 0 => x = 10

(3x-1) =0 => x = 1/3

=> 2x(4x-5) = 0

2x = 0 => x = 0

(4x-5) = 0 => x = 5/4

Bon courage.

Explications étape par étape

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