With the initial guess of \( x_0 = 1, x_1 = 2 \), the first iteration value using secant method for \( f(x) = x^2 + 5x + 4 \) will be _______.
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The Secant Method can be thought of as a linear interpolation between two points. It is often faster than bisection but can fail to converge if the initial guesses are too far from the actual root.