Starting with x0=4x_0 = 4x0=4, use the iteration formula xn+1=8xn2+4\displaystyle x_{n+1} = \frac{8}{x_n^2} + 4xn+1=xn28+4 three times to find an estimate for the solution to x3−4x2=8x^3 - 4x^2 = 8x3−4x2=8.
