Decompose the following polynomials into factor 2 (A-1) &# - 12 (A-1)

Decompose the following polynomials into factor 2 (A-1) &# - 12 (A-1)

2(a-1)²-12(a-1)
=2(a-1)(a-1-6)
=2(a-1)(a-7)