How can I obtain the minimum slope with fmincon and a non-linear constraint?

Hi guys,

I got a rather simple problem to help me understand fmincon better.. I have a linear function

 -->  Link1 :  g= a1*x

The non linear constraint is:

    function [ c, ceq ] = Easycon(a2,x)

    c=-x^2+a2*x-14;

    ceq=[];

    end

where a2 = 6+a1 ( i tried to copy the example)

my fmincon is now:

x=fmincon(@(x) Link1(x,a1),[1],[],[],[],[],[],[],@(x) Easycon(x,a2),options)

options are already set.

I want to get like a1=1.4 more or less (which is the answer i'm looking for)

it doesnt give errors but the values are enormous.. Can anybody plz help me :)

thanks!