(c-2)(c+3)(c-1)(c-2)(c+3)(c-1)² = (c² - 2c + 3c - 6)(c-1)= (c² + c - 6)(c-1)= (c² + c - 6)(c² - 2c + 1= c^4 - 2c^3 + c^3 + 2c^2 - c^2 - 4c + 6c - = c^4 - c^3 + c^2 + 2c - 6
3(a+c)²-6a3(a+c)² - 6ac = 3a² + 6ac + 3c² - 6a= 3a² + 3c= 3(a² + c²)
(c-2)(c+3)(c-1)
(c-2)(c+3)(c-1)² = (c² - 2c + 3c - 6)(c-1)
= (c² + c - 6)(c-1)
= (c² + c - 6)(c² - 2c + 1
= c^4 - 2c^3 + c^3 + 2c^2 - c^2 - 4c + 6c -
= c^4 - c^3 + c^2 + 2c - 6
3(a+c)²-6a
3(a+c)² - 6ac = 3a² + 6ac + 3c² - 6a
= 3a² + 3c
= 3(a² + c²)