Pouvez vous m'aider à factoriser ces expressions, Merci : A = 3x (5x + 1) + (5a + 1) (-7x-4) B = (x - 4) (7 - x) + (x + 3) (7 - x) C = (2x + 3) (5x - 1) - x (2x

bonjour

A = ( 5 x + 1) ( 3 x - 7 x - 4) = ( 5 x + 1) ( - 4 x - 4)

B = ( 7 - x ) ( x - 4 + x + 3) = ( 7 - x ) ( 2 x - 1 )

C = ( 2 x + 3 ) ( 5 x - 1 - x ) = ( 2 x + 3 ) ( 4 x - 1)

D = ( 4 x - 5) ( x  -3 - 3 x + 1 ) = ( 4 x - 5) ( - 2 x - 2)