Développe puis réduis chaque expression A= 5(10x+8) B= 9x(6-6x) C= 3(4x+7)+4(2x-5) D= 7x(2x-5)-x(2x-5) E= (2x-5)(3x-2) F= (2x+3)(5x-8)-(2x-4)(5x-1) G= (3x+7)°(a

A=50x+40
B=54x-54xau carré
C=12x+21+8x-20
C=20x+1
D=14xaucarré-35x-2xaucarré+5x
D=12xaucarré-30
E=6xaucarré-4x-15x+10
E=6xaucarré-19x+&à
F=10xaucarré-16x+15x-24
F=10xaucarré-x-24
G=(3x+7x)au carré+(7-3)au carré

A = 5 (10x + 8)
A = 5 X 10x + 5 X 8
A = 50x + 40

B = 9x (6 - 6x)
B = 9x X 6 + 9x X (- 6x)
B = 54x - 54x²
B = - 54x² + 54x

C = 3 (4x + 7) + 4 (2x - 5)
C = 3 X 4x + 3 X 7 + 4 X 2x + 4 X (- 5)
C = 12x + 21 + 8x - 20
C = 20x + 1

D = 7x (2x - 5) - x (2x - 5)
D = 7x X 2x + 7x X (- 5) - x X 2x - x X (- 5)
D = 14x² - 35x - 2x² + 5x
D = 12x² - 30x

E = (2x - 5) (3x + 2)
E = 2x X 3x + 2x X 2 - 5 X 3x - 5 X 2
E = 6x² + 4x - 15x - 10
E = 6x² - 11x - 10

F = (2x + 3) (5x - 8) - (2x - 4) (5x - 1)
F = [2x X 5x + 2x X (- 8) + 3 X 5x + 3 X (- 8)] - [2x X 5x + 2x X (- 1) - 4 X 5x - 4 X (- 1)]
F = (10x² - 16x + 15x - 24) - (10x² - 2x - 20x + 4)
F = 10x² - x - 24 - 10x² + 2x + 20x + 4
F = 21x - 20

G = (3x + 7)² + (7x - 3)²
G = [(3x)² + 2 X 3x X 7 + 7²] + [(7x)² - 2 X 7x X 3 + 3²]
G = 9x² + 42x + 49 + 49x² - 42x + 9
G = 58x² + 58