Réponse :
coucou,
Exercice2:
A= 4*(5x -6) -(6x -10)
= 20x -24 -6x +10
= 14x - 14
B= (5x -1)(2 -x ) -9
= 10x -5x² -2 +x -9
= 11x - 5x² - 11
C= (3x -8 )(x+5 )= 3x² + 7x - 40
D= (x - 2)( 8x+ 5)=8x² - 11x -10
E= x(x+6) + (7 -x)(2+x)
= x² +6x +14 +7x -2x -x²
= 11x + 14
Exercice 3:
F= 12 -3x
= (4*3) - (3*x)
= 3 (4-x)
le reste ..........?
