Insert Equation directly into the code

This code is for finding roots for an equation. My code runs fine how it is. But I do not like how I have to use the input command to call the function. I want the code to run with the function in the code.

The function I am using is x^2-6. But I cannot not seem to make it happen. It says x is not a defined variable. How do I fix this?

 f1 = input('Equation','s');  %%%%I want f1 = x^2-6

 f = inline(f1);

 xl = 0;

 xu = 10;

 xe = (xl+xu)/(2);

 acc = 0.0001;

 while abs(f(xe))> acc

       i = i + 1;

    if (f(xe)*f(xu)) < 0

        xl = xe;

    else

        xu = xe;

    end

    xe = (xl+xu)/2;

 end

 fprintf('%d)\t%f\tf(x)=%f\n',i,xe,f(xe));

Answer 1

[Benjamin Kraus]

You want to use an anonymous function :

f = @(x) x^2-6;

[WhatIsMatlab-]

Thank you!! That's exactly what I wanted.

Answer 2

[Tavaris Jones]

x-14=-2y-3z