bonjour

A = ( x - 2 ) ( x + 9 )

B = ( 8 x - 1 ) ( 7 - 2 x )

C = ( 2 - 5 x ) ( 10 y + 9 )

D =  ( y - 8 ) ( 21 + 14 x )

Bonjour,

Factoriser :

A = x(x-2)+9(x-2)

A = (x-2)(x+9)

B = 7(8x-1)-2x(8x-1)

B = (8x-1)(7-2x)

C = 10y(2-5x)+(2-5x)9

C = (2-5x)(10y+9)

D = 21(y-8)+14x(y-8)

D =  7(y-8)(3+2y)

Bonne journée.