Exercice n°1: Développer
A=(x-4)(x+6)
F (4-2x)(-1-3x)
E=(x+2)(-x-3) + 3x
D=x(x-1)-3(x+1)

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Grade: Education Subject: mathematiques

Exercice n°1: Développer
A=(x-4)(x+6)
F (4-2x)(-1-3x)
E=(x+2)(-x-3) + 3x
D=x(x-1)-3(x+1)
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Bonjour;

A=(x-4)(x+6)

= x² +6x -4x -24

= x² +2x -24

F (4-2x)(-1-3x)

= -4 -12x +2x +6x²

= 6x² -10x -4

E=(x+2)(-x-3) + 3x

= -x² -3x -2x -6 +3x

= -x² -2x -6

D=x(x-1)-3(x+1)

= x² -x -3x -3

= x² -4x -3