Posted by Lilly on Monday, November 14, 2011 at 12:41am.
Solve the equation by factoring, by finding square roots, or by using the quadratic formula.
3(x+4)^2= 27

Math  Bosnian, Monday, November 14, 2011 at 1:45am
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

Math  Henry, Tuesday, November 15, 2011 at 7:23pm
post it.
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