Sagot :
Bonjour,
A= 5x+4(2x+3)=
5x+ 8x =12 =
13x +12
.B= (5x + 4) (2x+3)=
10x² +15x +8x +12=
1àx² +23x +12
C= (4x-5) x 2x+8 =
8x² -10x +8
.D=(4x-5) (2x+8)
8x² +32x -10x -40 =
8x² +22x -40
utilise * pour les multiplications
Réponse:
A = 5x+4(2x+3)
= 5x+8x+12
A = 13x + 12
B=(5x + 4) (2x+3)
= 10x^2+15x+8x+12
B= 10x^2+23x+12
C=(4x-5) x 2x+8
C= 8x^2-10x+8
D= (4x-5) (2x+8)
= 8x^2+32x-10x-40
D= 8x^2+22x-40
Voili voilou ;)