## Monday, September 8, 2008

### Corrections/Riviewing Grade 9 Math, Multiplying Polynomials.

Today, we now have a different teacher for math class and her name is Mrs.Ingram. For the classmates who doesn't know, the reason why Mr.K is not showing up for class is because he is busy with his personal life outside of school and won't be coming back for awhile.

Today, we looked over our worksheet from last week homework, "Polynomials Exercise 1" and did corrections on it.

I will give you guys the correct answers for the questions below for the worksheet.

1.) Simplify each of the expressions below.

a) (a - 3b) + (2 + 2b)

b) (8k + 3m) + (2k - 5m)

c) (3a + 2b) - (a + 3b)

d) 3(2x^2y - 3xy + 7) + (xy - 3x^2y - 2)

e) x(4x^2 + 5x) -2x^2(5x^2 - 2x)

f) (1/2x + 1/3y) - (3/2x + 2/3y + 5) + (7/2x + 1/5y + 4)

2. Find the sum of 7x^4y^3 - 3xy and 6x^5 - 5xy .

3. Wanda's age is (4x + 3y + 6) and her daughter's age is (2x - y - 4). Find the difference of their ages , expressing your answer in terms of x and y .

Mrs.Ingram gived us examples "Multiplying Polynomials"
example- 3(x^2+6x+9)= 3x^2+18x+27

example- x(x^2+6x+9)= x^3+6x^2+9

example- (x+4)(x-2)= x^2-2x+4x-8= x^2+2x-8

Today homework is in our textbook.
"Multiplying Polynomials" Riviewing.
Exercise 1 questions#1-10
MUST BE DONE BY TOMORROW!

IF YOU EVER NEED HELP IN ANYTHING IN MATH!!
**REMEMBER TO ASK PEOPLE FOR HELP, DON'T BE SHY, YOU CAN ASK ME FOR HELP FOR EXAMPLE** & BE POSITIVE!! X)

Next Scribe is..........KRIS!?

#### 1 comment:

Ellen said...

My teacher doesn't even try to help
me with multiplying polynomials .
She just reviews it over really quickly .
I want our school to have something like this . This is a great way to learn and help others . :)