Correct answer only ! what is the completely factored form?

Its A

Step-by-step explanation:

I think its the first set so I'll expand it:-

(x + 3)(x - (-1 + √3)(x - (-1 - √3))

= (x + 3)( x + 1 - √3)(x + 1 + √3)

= (x + 3)(x^2 + x + √3 + x + 1 + √3 -√3x  - √3 - 3)

=  (x + 3)( x^2 + 2x - 2)

=  x^3 + 2x^2 - 2x + 3x^2 + 6x - 6

= x^3 + 5x^2 + 4x - 6

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3