Sagot :
bonjour
F=2x-3+8-4x+x²
= x² - 2 x + 5
G=3x+9-7x+8+4x
= 17
H=8x-3x×x+3-15×x+15×x+11x²-6+2x-5x²
= 8 x - 3 x² + 3 - 15 x + 15 x + 11 x² - 6 + 2 x - 5 x²
= 3 x² - 5 x - 3
Réponse:
F= 2x-3+8-4x+x²
= 2x+5-4x+x²
= -2x+5+x²
= x²-2x+5
G= 3x+9-7x+8+4x
= 3x+17-7x+4x
= 17