一日一学习/Daily Study (1 : Maths)

Question for Daily Study first session is not difficult:

Once you finish the question, email me together with your FB name, real name, School name, and your Form/Standard :)
Please include the steps in your answer
The answer/solution will be shown by 11pm :)
Enjoy

My email: tancheeseng84@gmail.com

If you never study about Indices, or need note for revision, you may refer here:
Note for Indices

For Form 3 entering Form 4 students, or any students never studied about Indices topic, you may refer to the hint here:
Daily Study Session 1: Hint


For the students already completed, you may check your answer here:

 Daily Study Session 1: Answer