Approximate positive root of the equation
\[
x^2-7x+9=0
\]
using Newton-Raphson method with initial guess \(x_0=2\).
Show Hint
In Newton-Raphson problems, one or two iterations are usually sufficient for objective questions. Carefully compute \(f(x_n)\) and \(f'(x_n)\) before substituting into
\[
x_{n+1}=x_n-\frac{f(x_n)}{f'(x_n)}.
\]