The answer is x(x-8)(x+8) Here is the process; x^3-64x x(x^2-64) You know that it will be a x- and a x+ becuase there is no middle x value x(x-)(x+) x(x-8)(x+8)
The mean temperature for the first 4 days in january was 7°c. the mean temperature for the first 5 days in january was 5°c. what was the temperature on the 5th day?