bonsoir
E = ( x + 3 )² - 9
E = ( x + 3 - 3 ) ( x + 3 + 3)
E = x ( x + 6 )
G = ( 5x - 2 )² - 16
G = ( 5 x - 2 - 4 ) ( 5 x - 2 + 4 )
G = ( 5 x - 6 ) ( 5 x + 2 )
I = ( 2 x + 6 )² - 64
I = ( 2 x + 6 - 8 ) ( 2 x + 6 + 8 )
I = ( 2 x - 2 ) ( 2 x + 14 )
F = 100 - ( 2 x + 1 )²
F = ( 10 + 2 x + 1 ) ( 10 - 2 x - 1 )
F = ( 2 x + 11 ) ( - 2 x + 9 )
H = 81 - ( 5 x + 6 ) ²
H = ( 9 + 5 x + 6 ) ( 9 - 5 x - 6 )
H = ( 5 x + 15 ) ( - 5 x + 3 )
fais le dernier
