Sagot :
bonjour
A = - 5 x - 10
C = 2 x² - 14 x
E = 12 x² + 6 x
B = - 3 x + 6
D = - 3 x² - 12 x
F = - 20 x² + 40 x
a)=-5x+(-5)x2=-5x-2
b)=-3x - 3x(-2)=-3x - 6
c)=2x X x - 2x X 7= 2x(au carré) - 14
d)=-3x X x + (-3x) X 4= -3x(au carré) -12x
e)=6x X 2x + 6x X 1=12x(au carré) + 6x
f)-4x X 5x - (-4x) X 10=-20x - 40x=-60x
b)=-3x - 3x(-2)=-3x - 6
c)=2x X x - 2x X 7= 2x(au carré) - 14
d)=-3x X x + (-3x) X 4= -3x(au carré) -12x
e)=6x X 2x + 6x X 1=12x(au carré) + 6x
f)-4x X 5x - (-4x) X 10=-20x - 40x=-60x