jacobdavis02p3r0jg
jacobdavis02p3r0jg jacobdavis02p3r0jg
  • 02-11-2018
  • Mathematics
contestada

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)

Respuesta :

MrsStrong
MrsStrong MrsStrong
  • 31-12-2018

Answer:

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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