Develop a function for the modified secant method

function root $=$ modSecant$($func$,xr,$ delta, es$,$ maxlterations$)$

$x_r=x_r-\frac{x_{r}f(x_r)}{f(x_r+x_r)-f(x_r)}$

Test the function with:

$f(x)=5x^3-2x^2+x-3\mathrm{.}4$

Using $xr=1\mathrm{.}5,$ delta $00\mathrm{.}02,$ es $0\mathrm{.}0001,$ and maxit $=50.$ Plot the results.

root $=0\mathrm{.}9470$

Please do in matlab and generate the plot below identical