Math
posted by Lilly on .
Solve the equation by factoring, by finding square roots, or by using the quadratic formula.
3(x+4)^2= 27

3 ( 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 
post it.