Répondre :
1°)
f(x) = (3x-2)(x+5)
f(x) = 3x x x + 3x x 5 - 2 x x - 2 x 5
f(x) = 3[tex] x^{2} [/tex] + 15x - 2x -10
f(x) = 3[tex] x^{2} [/tex] + 13x - 10
g(x) = (2x+2)(3x-2)
g(x) = 2x x 3x + 2x x (-2) + 2 x 3x + 2 x (-2)
g(x) = 6[tex] x^{2} [/tex] - 4x + 6x - 4
g(x) = 6[tex] x^{2} [/tex] + 2x - 4
f(x) = (3x-2)(x+5)
f(x) = 3x x x + 3x x 5 - 2 x x - 2 x 5
f(x) = 3[tex] x^{2} [/tex] + 15x - 2x -10
f(x) = 3[tex] x^{2} [/tex] + 13x - 10
g(x) = (2x+2)(3x-2)
g(x) = 2x x 3x + 2x x (-2) + 2 x 3x + 2 x (-2)
g(x) = 6[tex] x^{2} [/tex] - 4x + 6x - 4
g(x) = 6[tex] x^{2} [/tex] + 2x - 4