Développer A = x+4(3x + 2) B = 5x-( x + 1)(6x-2) Aidez moi svp !!!!

coucou

A = x+4(3x + 2)

x+12X+8

13X+8

B = 5x-( x + 1)(6x-2)

5X-(6X au carrer -2X+6X-2)

5X-(6X au carrer+4-2)

5X-6X au carrer-4x+2

X-6X au carrer +2

Bonsoir !

A = x+4(3x+2)

A = x+12x+8 = 13x+8

B = 5x-(x+1)(6x-2)

B = 5x-(6x²-2+6x-2)

B = 5x-6x²+2-6x+2

B = -6x²-x+4

Bon courage.