Starting with x0=3x_0 = 3x0=3, use the iteration formula xn+1=7xn2+2\displaystyle x_{n+1} = \frac{7}{x_n^2} + 2xn+1=xn27+2 three times to find an estimate for the solution to x3−2x2=7x^3 - 2x^2 = 7x3−2x2=7
