Question

Simplifique: (x -3)² - (x - 2)² + (x - 1)²​

Answer 1

x² - 6x + 9 - (x² - 4x + 4) + x² - 2x +1
x² - 6x +9 - x² + 4x - 4 + x² - 2x + 1
-4x + 6 + x²

x² - 4x + 6