Answer:
(2(x-2)(3x+2)
1.(Combine like terms)
4x^2-8+2x^2-8x
6x^2-8-8x
2.Rearrange terms
6x^2-8-8x
6x^2-8x-8
3.Common factor
(4x^2-8)+(2x^2-8x)
2(3x^2-4x-4)
4. use the sum-product pattern
2(3x^2-4x-4
2(3x^2+3x-6x-4
5. common factor from the two pairs
2((3x^2+2x)+(-6x-4))
2(x(3x+2x)-2(3x+2))
6.rewrite in factored form
2(x(3x+2)-2(3x+2))
2(x-2)(3x+2)