+0  
 
+1
40
1
avatar+153 

Solve \(x = 2 \sqrt{x - 4} + 4\)

 Apr 19, 2020
 #1
avatar+20812 
+2

     x  =  2sqrt(x - 4) + 4

x - 4  =  2sqrt(x - 4)

square both sides:

(x - 4)2  =  ( 2sqrt(x - 4) )2

x2 - 8x + 16  =  4(x - 4)

x2 - 8x + 16  =  4x - 16

x2 - 12x + 32  =  0

 

Factor and finish ...

 Apr 19, 2020

39 Online Users

avatar
avatar
avatar
avatar