Répondre :
Réponse :
Factorise les expressions suivantes:
a. (x-3)(2x + 1) + (x-3)(5x-7)
(x-3)[(2x + 1) + (5x-7)]
b. (5x-6)(11x+6) + 8(11x + 6)
(11x+6)[(5x-6) + 8]
c. (7x25)(3x+9) + (7x - 12)(3x+9)
(3x+9)[(7x25) + (7x - 12)]
d. (8x5)(14x + 5) + (14x + ???
incomplet
Bonjour;
a. (x-3)(2x + 1) + (x-3)(5x-7)
(x-3) ( 2x+1 +5x-7)
= (x-3) ( 7x -6)
b. (5x-6)(11x+6) + 8(11x + 6)
= (11x+6) ( 5x-6 +8)
= (11x+6) ( 5x +2)
c. (7x?? 25)(3x+9) + (7x - 12)(3x+9)
= (3x+9)(...+7x+12)
d. (8x5)(14x + 5) + (14x +5)
= (14x+5) ( 40 +1)
= (14x+5 ) ( 41)