### Scribe Post for March 4, 2010

Thursday, March 4, 2010
Today we had a double math class. In the morning we did our test, then in the afternoon we learned more about our new unit.

Multiplying monomials by polynomials:

(3x) (x + 5)

model:
• this model says that the answer would be 3x^2 +15, because the large squares represent x^2 and the skinny rectangles represent x. So if you multiply to x's together they become x^2. When you multiply an x and a constant (5), the answer results in x.
Algebraic:

(3x) (x +5)

(3x) (x) + (3x) (5)

= 3x^2 + 15x
• In the algebraic way you use distributed property, which means to multiply a single term and two or more terms inside a set of parentheses (brackets)
The second example we did in class:

(2x-3) (2x)

model:
• The answer shown in the picture would be: 4x^2 + -6x
Algebraic:

(2x-3) (2x)

(2x) (2x) + (2x) (-3)

=4x^2 -6x

Then we got some other questions to solve, but we did not have to make a model for it.

1) (2y-1) (7y)

(2y) (7y)+(-1) (7y)

= 14y^2 - 7y

2) (y+2) (-6y)

(-6y) (y) + (-6) (2)

= -6y^2 - 12y

Homework:
read pg 264-268 ( key ideas)

check your understanding # 2, 3

practise # 4 or 5
6 or 7
8 or 9
12-21

Due on monday ( stash it stuff)

Kayaks for Rent or What Have You Got to Hide (Challenges)

Foldable

Self-Assessment

Signed Test

That's my scribe! For the next scribe I choose Kim.