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)

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step-by-step explanation:

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step-by-step explanation:

use cymath