Bonjour.
a) A=5xau carre+8x -> 5x²+8x = x(5x+8)
B= 7xaucarre -4x -> 7x²-4x = x(7x-4)
C= 13x+5xaucarre -> 13x+5x² = x(13+5x)
D= 8xaucarré + ''x'' -> 8x²+x = x(8x+1)
E=3x- 5x au carré -> 3x-5x² = x(3-5x)
F=6x au carré- x -> 6x²-x = x(6x-1)
G=4x au carré + 5x -> 4x²+5x = x(4x+5)
H=7x au carré -4x -> 7x²-4x = x(7x-4)
I=8x au carré-9x -> 8x²-9x = x(8x-9)
k=11x au carré +9x -> 11x²+9x = x(11x+9)
J=''x''+7x au carré -> x+7x² = x(7x+1)
L=3x - 7x au carré -> 3x-7x² = x(-7x+3)