exo 8 math !!!!!!!!!!!!!!!!!!!!!!!!!!

Exercice 8 : 

G = 4x + 8
G = 4 * x + 4 * 2
G = 4 (x + 2)

H = a² - 15a
H = a * a - 15 * a
H = a (a - 15)

I = 7y - 7
I = 7 * y - 7
I = 7 (y - 1)

J = 4a² - 6ab + 10a
J = 4 * a * a - 6 * a * b + 10 a
J = a (4a - 6b + 10)