bonjour
A = 4 x + 16
A = 4 ( x + 4 )
B = x² - 3 x
B = x ( x - 3 )
C = - 3 x + 3
C = - 3 (x - 1 )
x² - 16 = ( x- 4 ) ( x + 4 )
a² - b² = ( a - b ) ( a + b )
E = ( x + 2 ) ( x - 2 ) = x² - 4
F = ( x - 6 ) ( x + 6 ) = x² - 36
G = ( 2 x + 4 ) ( 2 x - 4 ) = 4 x² - 16
H = ( x² - 25 ) = ( x - 5 ) ( x + 5 )
J = 9 x² - 1 = ( 3 x - 1 ) ( 3 x + 1 )