Svp aider moi !!!b. Factorise chaque expression. A = 5x + 2x + 10x В = Зах2 - Зах + За C = 9x(x - 3) + 9x(10 + 2x) D = (2x + 1)(8 + x) - (3x - 1)(2x + 1)

bonjour

A = x ( 5 + 2 + 10 ) = x ( 17 )

b = 3 a ( x² - x + 1 )

c =  9 x ( x - 3 + 10 + 2 x )  = 9 x ( 3 x + 7 )

d  = ( 2 x+ 1 ) ( 8 + x - 3 x + 1 )

=  ( 2 x + 1 ) ( - 2 x + 9 )