bonsoir
M = 3 x² + 7 x
= x ( 3 x + 7 )
N = 9 x² - 64
= ( 3 x + 8 ) ( 3 x - 8 )
O = ( 7 x + 2 ) ( 7 x + 2 - 2 x )
= ( 7 x + 2 ) ( 5 x + 2 )
P = ( 3 y + 1 )²
Q = x ( 4 x + 1 )
R = ( 2 - x ) ( 4 x - 1 - 8 + 3 x )
= ( 2 - x ) ( 7 x - 9 )
S = ( 2 - x ) ( 4 x - 1 - 8 + 3 x )
= ( 2 - x ) ( 7 x - 9 )
t = ( 5 x + 2 x + 1 ) ( 5 x - 2 x - 1 )
= ( 7 x + 1 ) ( 3 x - 1 )