SOLUTION: 2x-11&#8730;x -6=0 <--the -6 is not under the radical The problem asks to solve the problem by making an appropriate substitution. I tried moving all the numbers but -11&#8730

Algebra ->  College  -> Linear Algebra -> SOLUTION: 2x-11&#8730;x -6=0 <--the -6 is not under the radical The problem asks to solve the problem by making an appropriate substitution. I tried moving all the numbers but -11&#8730      Log On


   



Question 836763: 2x-11√x -6=0 <--the -6 is not under the radical
The problem asks to solve the problem by making an appropriate substitution.
I tried moving all the numbers but -11√x to one side and solving from there, but that obviously didn't give me a set of answers like the problem wants and it didn't involve substitution. My textbook isn't helping with this specific problem. Help?

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
How about u=sqrt%28x%29, then u%5E2=x,
2u%5E2-11u-6=0
%282u%2B1%29%28u-6%29=0
Two solutions:
2u%2B1=0
2u=-1
u=-1%2F2
sqrt%28x%29=-1%2F2
This is not a solution.
u-6=0
u=6
sqrt%28x%29=6
x=36