Factorization 4 (a-b) ^ 2-8a + 8B

Factorization 4 (a-b) ^ 2-8a + 8B

4(a-b)^2-8a+8b
=4(a-b)^2-8(a-b)
=4[(a-b)^2-2(a-b)]
=4(a-b)(a-b-2)