Hello guys just a few questions

1.) Factorise completely 2x^3 - 20x^2 + 46x - 28

here i took out the common factor to give 2(x^3 - 10x^2 + 23x - 14)

now when i began trying factors i wasnt sure whether to leave the 2 outside like so: 2((1)^3 - 10(1)^2 + 23(1) - 14))

or just (1)^3 - 10(1)^2 + 23(1) -14

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now the second part is long division... do i leave the two outside when long dividing or do i have to expand i back into the sum?