Factorization: (a2-2a + 2) 2 + 1 + 2 (- 2 + 2a-a2)

Factorization: (a2-2a + 2) 2 + 1 + 2 (- 2 + 2a-a2)

Original formula = (a2-2a + 2-1) 2
=(a2-2a+1)2
=(a-1)4