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If $x$ is a real number and $x^2 = 16$, what is the sum of all possible values of $x$?

 Apr 9, 2018
edited by gueesstt  Apr 9, 2018
edited by gueesstt  Apr 9, 2018
 #1
avatar+100456 
+2

x^2  =  16    take both roots

 

x  = ±√16

 

x  =  -4, 4

 

So...  the sum  = 0

 

 

cool cool cool

 Apr 9, 2018
edited by CPhill  Apr 9, 2018
 #2
avatar+1354 
+13

Good job CPhill!!

 Apr 9, 2018
 #3
avatar+1354 
+13

Awesomecoolcoolcool

 Apr 9, 2018

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