+0  
 
+1
357
3
avatar+4116 

17 Help.

 Feb 12, 2018
 #1
avatar+4569 
+1

First, add 5 to both sides. then square both sides, and then expand, and solve. The answer should be \(-2\)

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 Feb 12, 2018
 #2
avatar+557 
+1

explanation to tertre's answer

 

√2x+13 -5=x

+5               +5

√2x+13= x+5

2x+13=(x+5)^2

2x+13=(x+5)(x+5)

2x+13=x^2+5x+5x+25

2x+13=x^2+10x+25

2x=x^2+10x+25-13

2x=x^2+10x+12

x=x^2+10x+12/2

x=0.5x^2+5x+6

 

 

winkwinkwink

 Feb 12, 2018

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