MATLAB: Write the program to calculate real roots of quadradic equation with nested function.

functionsnested function

hi,i I'm pretty new in matlab .i wanna write the program to calculate real roots of quadradic equation with nested function. 
    function[x1,x2]= quadratic(a,b,c)
    d=0
    disc;
        function disc
            d = sqrt(b^2-4*a*c);
        end
    disc;
    x1 =(-b + d)/(2*a);
    x2 =(-b - d)/(2*a);
    end
Error:File: quadratic2.m Line: 6 Column: 11
Identifier 'd' is not a function or a shared variable. To share 'd' with nested function, initialize it in the current
scope. For more information, see Sharing Variables Between Parent and Nested Functions.
i have no idea what should i do…

Best Answer

You are over complicating things! All you need is
   function[x1,x2]= quadratic(a,b,c)
           d = sqrt(b^2-4*a*c);
           x1 =(-b + d)/(2*a);
           x2 =(-b - d)/(2*a);
    end
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