bonsoir,
A = 2 x² + x + 10 x + 5
= 2 x² + 11 x + 5
B = 3 x² - 4 x + 18 x - 24
= 3 x² + 14 x - 24
C = 6 x² - 2 x - 15 x + 5
= 6 x² - 17 x + 5
Réponse :
A=(x+5) (2x+1)
A=2x²+x+10x+5
A=2x²+11x+5
B=(x+6)(3x-4)
B=3x²-4x+18x-24
B=3x²+14x-24
C=(2x-5)(3x-1)
C=6x²-2x-15x+5
C=6x²-17x+5