+0  
 
+1
35
1
avatar+338 

http://prntscr.com/kyzh9j

critical  Sep 26, 2018
 #1
avatar+90053 
+1

l 2x  - 8  l  + 3  = 5    subtract  3 from both sides

 

l 2x - 8 l   = 2      

 

This actually says that we have these two equations

 

(2x - 8)  = 2  or   - (2x - 8)  = 2

 

So...answer "K"

 

To see the reason for this suppose we have   l a l  = 9....note that two values of  "a"  make this true...either  a = 9  or  a = -9

 

 

cool cool cool

CPhill  Sep 26, 2018

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