Bonjour,
a. A(x) = (5x – 4)(x + 1)-3(5x – 4)
=(5x-4) (x+1 -3)
=(5x-4)( x-2)
b. B(x) = (2x + 5)² – (3x + 1)(2x + 5)
= (2x+5) (2x+5 -3x -1)
= (2x+5) ( -x +4)
Réponse :
Bonjour
Explications étape par étape :
A (x) = (5x – 4) (x + 1) -3 (5x – 4)
A = (5x-4) ( x +1 -3)
A = (5x-4) ( x-2)
B (x) = (2x + 5)² – (3x + 1)(2x + 5)
B = (2x+5) (2x +5 -3x -1)
B = (2x+5) ( -x +4)