Bonsoir
Développer puis réduire chaque expression si possible
A(x) = (x + 7)(x + 5)
A (x) = x² + 5x + 7x + 35
A (x) = x² + 12x + 35
B(t) = (t -2)(t +9)
B (t) = t² + 9t - 2t - 18
B (t) = t² + 7t - 18
C(x) = (4x + 3)(x - 6)
C (x) = 4x² - 24x + 3x - 18
C (x) = 4x² - 21x - 18
D(x) = (-2x + 8)(4 - x)
D (x) = - 8x + 2x² + 32 - 8x
D (x) = 2x² - 8x - 8x + 32
D (x) = 2x² - 16x + 32
G(x) = (3x + 4)(5x - 8)
G (x) = 15x² - 24x + 20x- 32
G (x) = 15x² - 4x - 32
H(C) = (2t - 3)(2t + 3)
H (c) = 4t² - 9.