Which off the following expressions is equal to - 3x^2-12

A. (-3x+2i) (x-6i)

B. (-3x-6i) (x+2i)

C. (-3x-6i) (x+2i)

D. (-3x-4i) (x-3i)

B. (-3x-6i) (x+2i)

C. (-3x-6i) (x+2i)

Since they are the same answer choice. Should be (-3x-6i) (x-2i) should be the correct answer.

Step-by-step explanation:

The polynomial - 3x^2-12 can be factored using GCF into - 3 (x^2+4).

x^2+4 is a sum of squares and factors into the form (x+ai) (x-ai).

x^2+4 factors into (x+2i) (x-2i).

We put them together and have - 3 (x+2i) (x-2i) = (-3x-6i) (x-2i)