Réponse :
Bonjour,
[tex]A = 4(8 - 3x)\\\\= 32 - 12x[/tex]
[tex]B = 3x(2x - 5) - (3x - 7)\\\\= 6x^2 - 15x - 3x + 7\\\\= 6x^2 - 18x + 7[/tex]
[tex]C = (2x + 4)(3x - 5)\\\\= 6x^2 - 10x + 12x - 20\\\\= 6x^2 + 2x - 20[/tex]
[tex]D = 2 - (3x - 4)\\\\= 2 - 3x + 4\\\\= -3x + 6[/tex]
[tex]E = (x - 2)^2 - 25\\\\= x^2 - 4x + 4 - 25\\\\= x^2 -4x - 21[/tex]
[tex]F = 25x^2 + x\\\\= x(25x + 1)[/tex]
[tex]G = (5a + 3)^2 - 16\\\\= (5a + 3)^2 - 4^2\\\\= [(5a + 3) - 4][(5a + 3) + 4]\\\\= (5a - 1)(5a + 7)[/tex]