montanoalissa6 montanoalissa6
  • 25-06-2020
  • Mathematics
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which of the following expressions is equal to -3x^2-12??!!! please help him

which of the following expressions is equal to 3x212 please help him class=

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wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 25-06-2020

Answer:

-3 ( x+2i) (x-2i)

Step-by-step explanation:

-3x^2-12

Factor out a -3

-3(x^2 +4)

Rewrite

-3 ( x^2 - -4)

-3 ( x^2 - (-2i)^2)  This is the difference of squares ( a^2 -b^2 ) = (a-b)(a+b)

-3 ( x- -2i) (x+2i)

-3( x+2i) (x-2i)

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