Réponse :
Bonsoir;
Explications étape par étape
E= 2x x 3x +2x x 7 +5x 3x +5x7 = 6x² +14x+15x+35 = 6x² +29x +35
F= ( 5x +8) (2x -7) = 5x x2x +8 x 2x -5x x7 + 8 x-7 = 10x² +16x -35x -56
10x² -19x -56
G = (2x -5 ) ( 3x -2) = 2x x3x -5 x3x +2x x -2 - 5 x-2 =
6x² -15x -4x +10 = 6x² - 19x +10
H = ( 2 +x) ( 5x -4 )
= 2 x5x +x x 5x x -2 x 4 + x x -4 =
10x + 10x² -8 - 4x = 10 x² +6x -8
