In this question we will use a spreadsheet to approximate the root of f x x 5 3x 3 9 using Newton s method with x0 1 The picture below shows a spreadsheet being used to perform the calculation A downwards arrow indicates the contents from the cell above will be copied down 1 2 3 4 A A1 B1 C1 B C Using a spreadsheet find the following values x1 ANSWER Give your answer to at least 3 decimal places x2 ANSWER Give your answer to at least 3 decimal places