A= 5(2x + 4)
A= 5*2x + 5*4
A= 10x + 20
B= x(4+2x)
B= x*4 + x*2x
B= 4x + 2x^2
C= 6x(5+3x)
C= 6x*5 + 6x*3x
C= 30x + 18x^2
D= 3(8x + 5)
D= 3*8x + 3*5
D=24x + 15
E= 4x(7 + 3x)
E= 4x*7 + 4*3x
E= 28x + 12x
F= x(6x + 8)
F= x*6x + x*8
F= 6x^2 + 8x
A toi de continuer, tu suit :
a(b+c) = a*b +a*c = ab + ac
