Sagot :

Pamc

Bonjour,

Exercice 1

1. A=(2x-3)(-3x+5)

A=-6x²+10x+9x-15

A=-6x²+19x-15

B=3(5x-7)-5(2x+4)

B=15x-21-10x-20

B=5x-41

2. C=18x-45

C=9*2x-9*5

C=9(2x-5)

D=6x³-15x²+12x

D=3x*2x²-5x*3x+3x*4

D=3x(2x²-5x+4)

Exercice 2

1. (x+1)(x+3)

2. x*(x+3)/2

3. A(x)=(x+1)(x+3)-x*(x+3)/2-3*(x+1)