Bonsoir,
E = (3x + 5)(7x + 2) - (3x + 5)(-4x + 1)
(3x+5) (7x+2 +4x -1)=
(3x+5) (11x +1)
F = 25x² – 70x + 49
( 5x -7) (5x-7)
G = 169x² - 142
(13x- √..)(13x + √...)
Ce n'est pas 142
H = (4x + 7)(8 – 3x) + (4x + 7)
( 4x+7 )( 8-3x +4x+7)=
(4x+7)( x +15)
I = (5x – 3)2 – 7(5x – 3)
(5x-3) ( 2-7)=
(5x-3)( -5)