Processing math: 100%
 
+0  
 
0
992
3
avatar

The number of real solutions of the equation  |x-3|-|x+1|/2*|x+1|=1 is ??

 Aug 22, 2015

Best Answer 

 #1
avatar+118696 
+10

|x3||x+1|/2|x+1|=1|x3||x+1|2|x+1|=1|x3||x+1||x+1|2=1|x3|(x+1)22=1|x3|=1+(x+1)22|x3|=x2+2x+32x3=x2+2x+32orx3=x2+2x+322x6=x2+2x+3or2x6=x22x30=x2+9or0=x24x+3x2=9orx=4±16+122

 

x2=9orx=4±472x2=9orx=4±272x2=9orx=2±71x2=9orx=2±7x=±9orx=2+7orx=27$Soitappearsthattheonlyrealrootsare$x=2+7orx=27

.
 Aug 23, 2015
 #1
avatar+118696 
+10
Best Answer

|x3||x+1|/2|x+1|=1|x3||x+1|2|x+1|=1|x3||x+1||x+1|2=1|x3|(x+1)22=1|x3|=1+(x+1)22|x3|=x2+2x+32x3=x2+2x+32orx3=x2+2x+322x6=x2+2x+3or2x6=x22x30=x2+9or0=x24x+3x2=9orx=4±16+122

 

x2=9orx=4±472x2=9orx=4±272x2=9orx=2±71x2=9orx=2±7x=±9orx=2+7orx=27$Soitappearsthattheonlyrealrootsare$x=2+7orx=27

Melody Aug 23, 2015
 #2
avatar+130458 
0

Very nice, Melody...!!!

 

 

 Aug 24, 2015
 #3
avatar+118696 
0

Thanks Chris :)))

 Aug 25, 2015

3 Online Users

avatar