Bonjour, est ce que quelqu’un pourrait m’aider pour mon dm svpp

Ex 1:
A = 3x-4+1-2x = x-3
B = 3x-4-1+2x = 5x-5
C = 3x-6x²-4+8x = -6x²+11x-4
D = 3x-4+8x = 11x-4
E = 3x-4-2x = x-4

Ex 2:
A = x(4x+3)
B = (3x-4)[(2x+1)+(5x-1)]
= (3x-4)(2x+1+5x-1)
= (3x-4)7x
C = x(1-2x)-(3x+1)(-1+2x)
C = x(1-2x)-(3x+1)*(-1)(1-2x)
C = (1-2x)[x-(3x+1)(-1)]
C = (1-2x)(x-(-3x-1))
C = (1-2x)(x+3x+1)
C = (1-2x)(4x+1)

Bonjour ;

Exercice n° 2 .

[tex]A = 4x^2 + 3x = (4x+3)x .\\\\ B=(3x-4)(2x+1)+(3x-4)(5x-1) \\\\ = (3x-4)(2x+1+5x-1) = 7x(3x-4) .\\\\ C=x(1-2x) - (3x+1)(-1+2x) = x(1-2x)+(3x+1)(1-2x) \\\\ =(1-2x)(x+3x+1)=(1-2x)(4x+1) .[/tex]