Question

if x=2root 6+5 ,then x+1/x=​

Answer 1

Answer:5+2√6+1]/√[5+2√6]

Step-by-step explanation:

Starting with the first equation, solve starting backwards.  First, solve for x.  √6=2.45.  Multiply that by 2=4.9.  Add 5 to that=9.9.  This is x.  

Now just plug 9.9 in for x to the other equation.  √9.9=3.15.  Add that to 1/3.15 and you're left with a value of 3.47.