developpe et reduis chaque expression E = (2x+5) (3x+7) E= 2x X .......+2x X......+5x X......+5x....... E = E= F = (5x+8) (2x-7) G = (2x-5) (3x-2) H =(2 +x) (5

bonjour,

E = (2x+5) (3x+7)
E= 2x X 3x.......+2x X..7....+5 X..3x....+5X7.......
E = 6x²+14x+15x+35
E= 6x²+29x+35

F = (5x+8) (2x-7)
f = 5xX2x +5xX-7 +8X2x+8X-7
f = 10x²-35x+16x-56
f = 10x²-19x-56

G = (2x-5) (3x-2)
g = 2xX3x +2xX-2 -5X3x-5X-2
g = 6x²-4x-15x+10
g = 6x²-19x+10

H =(2 +x) (5x-4)
h = 2X5x +2X-4 +xX5x+xX-4
h = 10x-8+5x²-4x
h = 5x²+6x-8

Développement
E = (2x+5) (3x+7)
E= 2x X 3x +2x X 7 +5 X 3x +5 X 7
E = 6x² +14x +15x +35
E= 6x² +29x +35

F = (5x+8) (2x-7)
F = 5x X 2x +5x X -7 +8 X 2x +8 X -7
F = 10x² -35x +16x -35
F = 10x² -19x -35

G = (2x-5) (3x-2)
G = 2x X 3x +2x X -2 -5 X 3x -5 X -2
G = 6x² -4x -15x +10
G = 6x² -19x +10

H =(2 +x) (5x-4)
H = 2 X 5x +2 X -4 +x X 5x +x X -4
H = 10x -8 +5x² -4x
H = 5x² +6x -8