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Posted by **Lilly** on Monday, November 14, 2011 at 12:41am.

3(x+4)^2= -27

- Math -
**Bosnian**, Monday, November 14, 2011 at 1:45am3 ( x + 4 ) ^ 2 = - 27 Divide both sides with 3

( x + 4 ) ^ 2 = - 9

The left hand side is a perfect square,so you can apply the square root method :

x + 4 = + OR - sqrt ( - 9 )

x = + OR - sqrt ( - 9 )- 4

( Remark:

sqrt ( - 9 ) = sqrt ( - 1 * 3 ^ 2 ) =

+ OR - 3i

where i = Imaginary unit = sqrt ( - 1 )

)

x = + OR - ( 3 i ) - 4

- Math -
**Henry**, Tuesday, November 15, 2011 at 7:23pmpost it.

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