2 = 1?!?

Little Johnny went to his teacher one day after a lesson in algebra and claimed that he had managed to prove that 2 actually equals to 1. This is the proof that he provided:

x = 2

Multiply both sides of the equation by (x-1) to get:

x(x-1) = 2(x-1)

x²-x = 2x-2

x²-2x = x-2

x(x-2) = x-2

Divide both sides of the equation by (x-2) to get:

x = 1

Therefore 2 = 1

Does this really mean that 2 = 1? If not, at which step in the working did he go wrong?

Post your comments!

Happy CNY!

HAPPY CNY 2A!! Hope everyone's been enjoying your holiday.
About half the class has responded so far... for the other half, please respond soon.. late submissions will affect your grades!

Thanks to all those who have commented and left suggestions.. I will try to get cbox asap.. as soon as I manage to convince someone to help me get it up. (please understand that I am completely new to this!)

For those who are still not sure what to do,
- click on the comments link of the previous post and leave your comment.
- you do not have to email me.
- leave your real name and index no so I can grade you.

Ok, lastly, some important instructions for EVERYONE:
- please start to respond to your classmate's comments. I have not pointed out any mistakes (if there are any), or left any comments. I will not do so unless I deem necessary, so YOU will have to respond and discuss the topic among yourselves.
- Dear Eggyork, Aduial and Summer, I have no idea who you are, so please give me your name and reg no.
- Last reminder for those who still have not submitted their assignment: DO IT NOW PLEASE! Thanks!

Mathematics Reflection Journal

Chapter 1 : Proportion

Discuss and give examples to show how you can tell if two quantites are in direct proportion or inverse proportion.

Your task:

1. Write a reflection journal on the topic above. Deadline for submission: Friday, 8 Feb 08, 11.59pm.
2. From Saturday, 9 Feb 08 onwards, view your classmates posts and discuss / comment on them.

- This assignment is graded (upon 10 marks)

- Marks will be awarded on 1) Content & Knowledge, 2) Effort & participation

- Click on the 'comments' link below to do your assignment. Remember to write in your register number as well as your name!

- Have fun & enjoy your CNY holidays~

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