Répondre :
A = 9x² + 12x -10
A = 9 (0.5)² + 12 (0.5) - 10
A = 9 (0.25) + 6 - 10
A = 2.25 + 6 -10
A = 8.25 - 10 = -1.75
B = (3x + 2)² - 16x²
B = (9x² + 12x + 4) - 16x²
B = -7x² + 12x + 4
A = 9 (0.5)² + 12 (0.5) - 10
A = 9 (0.25) + 6 - 10
A = 2.25 + 6 -10
A = 8.25 - 10 = -1.75
B = (3x + 2)² - 16x²
B = (9x² + 12x + 4) - 16x²
B = -7x² + 12x + 4