[tex]bonsoir\\\\\\c = ( x - 5 ) ( 2 x - 1 + 3 x + 7 )\\c = ( x - 5 ) ( 5 x + 6 ) \\\\D = (3 x + 7 ) ( 2 x - 9 + 5 x - 7 ) = ( 3 x + 7 ) ( 7 x - 16 ) \\\\E = ( - 3 x + 4 ) ( 3 x - 8 - 7 x - 2 ) = ( - 3 x + 4 ) ( - 4 x - 10 ) \\ = 2 ( - 3 x + 4 ) ( - 2 x - 5 ) \\\\H = ( 2 x + 1 ) ( 6 x + 1 - 2 x + 7 ) = ( 2 x + 1 ) ( 4 x + 8 ) = 4 ( 2 x + 1 ) ( x + 2) \\\\\\[/tex]
