Bonsoir
A = 3
B = 2
C = 2
D = 2
E = 3
F = 1
G = (5x-3)² + ( 5x-3)(3x+2)
G = 25x² -30x+9 +(15x²+10x -9x -6)
G = 25x² -30x +9 +15x² +10x -9x -6
G = 40x² -29x +3
G = (5x-3)(5x-3)+(3x+2)
G = (5x-3)(5x-3+3x+2)
G = (5x-3)(8x +1)
(5x-3)(8x+1) = 0
soit 5x-3 = 0 donc 5x = 3 et x = 3/5
ou 8x+1 = 0 donc 8x = -1 et x = -1/8
pour x = -1, G = (-5-3)(-8+1) = -8 x -7 = 56
