Spreadsheets (excel) is used to solve a cubic equation, x^3 - 5x + 3 = 0; the equation is solved iteratively by Newton Raphson method.
A plot of line chart is carried out and the cart is the visualization of six convergent series, which provide the three approximate roots of the equation. The detail is to found on the worksheet.
The three approximate solutions are: -2.49086, 1.834243, 0.65662
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