merci de m aider car je ne comprends pas
1. A = 3(x² - 6x + 9) = 3(x-3)²
2.
B = 4(x² - 25) = 4(x-5)(x+5)
C = (x+1)(x²-1-8) = (x+1)(x²- 9) = (x+1)(x-3)(x+3)
D = (x-1)(4x² - 32x + 64) = 4(x-1)(x² - 8x + 16) = 4(x-1)(x-4)²
