Here are 3 sets of working that demonstrates the correct train of thoughts.
However, there are certain things that is not correctly represented, that resulted "error" in the presentation. Can you tell what went wrong?
Post-Lesson: Discussion in class
- The unit "m" (metres) should not be written alongside with the terms (and at the working).
- Only need to write the unit in the final answer.
- Since the expression comes with variables, it would be good to insert a ( ) to put the final expression together, and write the unit further away from the expression.