## November 26, 2011

### Global Exam Results

Hi class! I've just finished your Global Exams correction ;) You'll have the chance to check your operations and (sometimes) imagination next Monday. Meanwhile, I'm posting here the results:

 AB01 6,2 AB02 8,4 AB03 7,4 AB04 7,9 AB05 9,4 AB06 6,3 AB07 8,4 AB08 10 AB09 8,6 AB10 7,5 AB11 3,8 AB12 9,2 AB13 5,3 AB14 9,3 AB15 5,3 AB16 6,9 AB17 7,8 AB18 6,9 AB19 6,6 AB20 9,9 AB21 5,8 AB22 6,8 AB23 7,8 AB24 9,1 AB25 7,3

I've had no time at all to review your notebooks, so feel yourselves free to enjoy a weekend without maths homework :P

T.G.I.F!!

Attending to Monica's request, I've just add an incredible Finnish song: Sonata Arctica's Full Moon. I love this video! If you try to follow the misheard lyrics it really seems they sing what it's written XD

## November 22, 2011

### Prime Number Shitting Bear + New Challenge

Have you ever wondered about how many prime numbers may exist?

Well, I guess you haven't, but if you'd like to find out, you should visit a maths classic: The Prime Number Shitting Bear

NEW CHALLENGE

Let's finish this "numbers" units with this short challenge:

Can you find out the final result of the following opeartion?
$$\left(1-\frac{1}{2} \right) \cdot \left(1-\frac{1}{3} \right) \cdot \left(1-\frac{1}{4} \right) \cdots \left(1-\frac{1}{999} \right) \cdot \left(1-\frac{1}{1000} \right)$$

It's easier than it looks!

Allo and Maite were the only ones who answered the previous challenge. Congratulations guys! You've earned another positive ;)

## November 21, 2011

Hi class:)
I´m going to talk about today class.
First we have corrected our yesterday homework that was exercise number 55.Then Mario has explained us how to remove the common factor: we can remove the common factor to a polynomial expression in order to get an easier one.
This is an example: $$4x^{2}y+2xy-4xy^{4}=2xy(2x+1-2y^{3})$$
it means the you have to found one common factor on the polynomial and then you have to divide the polynomial between the common factor.

And after that Mario has explained to us the remarkable identities.
Example: $$(a+b)^{2}=(a+b)(a+b)=a^{2}+ab+ba+b^{2}=a^{2}+b^{2}+2ab$$
the explanation of the result of the operation is that you have to multiply all the factors by each other , it means that: $(a \cdot a) + (a \cdot b) + (b \cdot a) + (b \cdot b) = a^{2} + b^{2}+2ab$

I hope you have understood it.

## November 15, 2011

### Let's run a poll to find out who really wants this blog-project to continue

I would really like to give this blog and other "different" activities a sencond chance... would you?

If this works, I guess we can try to finish """"that"""" blog activity to learn how to write expressions like:

$$\Huge{P(x)=-\frac{2}{4}x^{4}+5x^{2}-3x+1},$$

so our blog looks more... professional.

It's up to you!!

Meanwhile (I mean, while you think your answer to this poll) you may listen to this Loituma's Classic Finnish song (one of the most difficult languages in the whole universe)
Maybe the song rings the bell with you... that's because there's a Disco version called Holly Dolly Song!

Be seeing you!!

### Today's lesson (15/11/11)

Today we have done operations with polynomials (page 62). First we learn how to add and substract polinomials. We did the exercise 15 a, b, c, and d. Then we learn how to multiply polynomials with three different cases. First we have multipied a natural number to a polinomyal then we have multiplied a monomial to a polinomial and finally we have multiplied a polinomyal to a polinomyal. It's quite easy.
The homewor is the exercise 15 ( only to multiply because to add and substract we have done in class)

Here is a vido very funny of jose mota i hope you like it :Phttp://www.youtube.com/watch?v=AgFg7hS8EAA

## November 13, 2011

Hi guys!
Mario doesn't deserve all the things we are doing. He is the most ''fiera'' teacher we have and it is our fault that we can't do the things he prepared for us. Please do an efford and behave better ok??
And don't blame anybody of the class because it is fault of all of us.

## November 7, 2011

### Blooger Session: Learning on creating new entries involving math formulas

As I promised, today we'll learn on how to create new entries with math expressions using just a few new symbols ;) When we need to work on a scientific paper, we use LaTeX Scientific Editor, which is worldwide famous.

-Exercise 0: Math's Enviroment and basic symbols: if you want to include a math formula on a entry or comment, you must first create a "math enviroment". It's very simple, you have to enclose your formulas using the dollar symbol: "$" Basyc Symbols: TeX recognizes the +, -, =, <, > and : symbols. If you want the multiplication point to be shown, you should write \cdot ("center dot").$3+5-2 \cdot 3 = 8 - 6 = 2$-Exercise 1: How do I write a fraction with LaTeX? To write a fraction, for example "one over eight", you should write "\frac{1}{8}" within a math enviroment (between dollars). The \frac part stands for "fraction". Try now to post this entry writing the following operation (you must yourself get the result): -Exercise 2: How do I write a power with LaTeX? To write a power, for example "4 raised up to 8", you should write "4^{8}" between dollars. The ^ symbols stands for "raised up to". Post a comment showing the solution of the following operation: -Exercise 3: Try to write the next expression combining the two examples above: -Exercise 4: How do I write brackets with LaTeX? Remember, every time you open a bracket (the "left" bracket) you must close it sooner or later (using the "right" bracket). LaTeX also works on well with the brackets symbols, so if we want to write, for example, we should type (-3)^{-2} between dollars. Type the needed code to represent the following expression: -Exercise 5: Final Test: Write a comment showing the formula: -Final Assigment: Would you like to be able to show your formulas in a bigger size? LaTeX provides you a quickly solution; for example:$\frac{1}{2}$$$\frac{1}{2}$$$\huge{\frac{1}{2}}\Huge{\frac{1}{2}}\$

## November 5, 2011

Hello sorry for the delay…etc
I’m going to write about the last lesson of maths that we have.
Firstly we corrected some exercises about irrational and rational numbers. After this, Mario explained to us the intervals:
There are three types of intervals: open intervals (a, b), closed intervals [a, b] and half closed intervals [a, b)
GOOD LUCK TO EVERYBODY ON WEDNESDAY EXAM!!!

Hi! I'm Mario "hacking" Iñigo's entry...  :P  Remember that I want you to bring all your doubts to our next Monday and Tuesday lessons, OK?? ;)

If you feel your brains are about to explode, you'd maybe find some relax watching the infinity-Nyan-Cat-loop XD

## November 3, 2011

Yesterday lesson

I´m sorry for the delay. Yesterday we did a lot of things. First we corrected the two exercises of homework about scientific notation and aproximation. After that Mario explained us the irrational numbers (I) and the real ones (R).
Then we did two exercises and finally we did our weekly test. Some exercises were a little difficult and Mario didn´t give us many time.

The homework are the exercises 72, 74 and 82.

REMEMBER THE EXAM OF NEXT WEDNESDAY!

The set of the Real Numbers (Rationals + Irrationals):

### The New Square shaped Challenge

OK, this week's challenge is clear enough to be written using one single phrase:

If you were asked to divide a square into 4 equal shaped parts... how many different ways would you come up with? One? Two? Three?... Eighty?...

You can either give me your solution in class or send it to my e-mail account. Remember: You're supposed to show the different ways of dividing the square you have discovered! (Feel yourself free to draw them using computer software or delighting us with your sketching skills :P )