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//Eg-4.10
//pg-161
clear
clc
// Secant Method
A=[-6 5 -3 2];
x1=0.5;
x2=0.7;
eps=10^(-10);
fx=poly(A,'x','c');
iter=1;
Abserr=100;
while Abserr>eps
printf('iteration number %i\n',iter);
xnew1=x2-horner(fx,x2)*(x2-x1)/(horner(fx,x2)-horner(fx,x1));
printf('xnew1 = %f \n',xnew1);
Abserr = abs(horner(fx,xnew1) - horner(fx,x1))/abs(horner(fx,xnew1));
x1=x2;
x2=xnew1;
iter=iter+1;
end
disp("result was found in iterations")
disp(iter-1)
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