URGENT SVP Développer, réduire et ordonner les expressions suivantes : (x) = (x + 6)(x + 8) g(x) = (x - 1)(-x + 7) h(x) = (x + 9)² i(x) = (x - 10)² j(x) = (x +

bonjour

(x) = (x + 6)(x + 8)
(x) = x² + 8 x + 6 x + 48
(x) = x² + 14 x + 48 

g(x) = (x - 1)(-x + 7)
g(x) =  - x² + 7 x + x - 7
g(x) = - x² + 8 x - 7 

h(x) = (x + 9)²
h(x) = x² + 18 x + 81

i(x) = (x - 10)²
i(x) = x² - 20 x + 100

j(x) = (x + 1)(-3x + 7)
j(x) =  - 3x² + 7 x - 3 x + 7
j(x) = - 3 x² + 4 x + 7

k(x) = (3x - 2)²
k(x) = 9 x² - 12 x + 4

l(x) = (x + 3)(x - 1) - (2x + 1)(3x - 1)
l(x) =  x² - x + 3 x - 3 - ( 6 x² - 2 x + 3 x - 1)
l(x) = x² + 2 x - 3 - 6 x² + 2 x - 3 x + 1
l(x) = - 5 x² + x - 2

m(x) = (2x - 1)² - (1! 4x)²
m(x) =  différence de 2 carrés = ( 2 x - 1 + 1 ? ??) ( 2 x - 1 - 1 ??,)
n(x) = (3x + 1)(3x - 1) ! (x + 6)(x - 6) signe