Scribe Post for March 25, 2010

Hello 9-05 (:
I'm the scribe for today. This is actually my fourth scibe, and I'm not sure if everyone's done their third scribe, so I'll just tell Mr.B to pick someone later on.

Well anyways, today in math class we talked more about polynomials.
We also talked about the GCF, or Greatest Common Factor.
It is the highest number that divides exactly in two or more numbers.
Here are some examples:



Here are the questions we had to solve:

1. 16x + 40 = 8 (2x + 5)
2. 15n - 24 = 3 (5n - 8)
3. -a^4 + 3a^3 - 2a^2 = a^2 (-a^2 + 3a - 2)
4. 12x - 9x^2 - 3x^2 - 6x^4 = 3x (4 - 3x - x^2 - 2x^3)
5. b^5 - 3b^4 = b^4 (b - 3)
6. x^2 y^2 z - x^3 y^2 z^2 + x^4 y^2 = x^2 y^2 (z - xy^2 + x^2)
7. 14x^3 - 21x^2 + 28x^4 - 35x^3 = 7x^2 (2x - 3 + 4x^2 - 5x)
8. 3b^4 - 6b^5 - 3b^4 (1 - 2b)

After that, Mr.B told us to solve these two questions:

1. a (a + 7) + 6 (a + 7)
2. (a + 6) (a + 7)

The answers ended up the same, which was a^2 + 13a + 42.

The last thing we did was the easiest of all:

1. 6t (3t - 1) + 9 (3t - 1) = (3t - 1) (6t + 9)
2. 4z (5 + z) - 3 (5 + z) = (5 + z) (4z - 3)
3. 6 (2a + 3) - 3a (2a + 3) + 2a^2 (2a + 3) = (2a + 3) (6 - 3a + 2a^2)

Mr.B also reminded us to go to http://www.mathplayground.com/ to play games over the break.

Well that's all for the scribe. We didn't do much, and sorry it's super short.
Like I said earlier, Mr.B will pick the next scribe (;

Reminders:
-FORMAL DAY!
-MOVIE DAY!
-SPRING DANCE!

Also, advance HAPPY SPRING BREAK ;D