Multiplying and Dividing Monomials.

In class we learned how to multiply and divide monomials. We started off by doing some easy integer questions.

Multiplying monomials:

To start off we did a four questions they were:

(3)(2)= 6

(-4)(4)= -16

(-7)(-3)=21

(5)(-6)= -30

then we got to harder questions

3(2x)= 6x "this means 3 groups of 2x"

we had to model it after wards

-4(3x)=-12x

(-3y)(-2x)= 6xy

"I think that the answer turned out to be xy because if you multiply two numbers with different variables you're answer has to have a degree of two."

(3x)(-3x) = -9x^2 (squared)

"This is one became squared because if you multiply two variables and they are both the same you get 2nd degree or squared"

Dividing Monomials:

Similar to Multiplication we had to do some questions.

6/3= 3

-8/4=(-2)

16/-8= -2

-15/-3= 5.

6x/3= 2x

How to model division monomials.

very similar to the multiplication model.

-4xy/-2x= 2y

"how?''

'' since there are two x's both of them get canceled out, leaving you with just the variable y''

-6y^2/2y= -3y

"since there were two y's on the first one, one gets canceled out and only one is left"

Not everything can get modeled for example:

-6^3/ -2x= 3x^2

"The reason for that is because we don't have anything to represent a cube."

HOMEWORK!!!

7.1 read pp 254-259

CYU#2

Practise : odd/even

Apply: all

Extend : 24,26,27

Homework book :7.1

" The next scribbler is Ryan Bautista"

Question # 2- JohnChua

write an example of a rational number in a/b form.

A. the number has a value greater than -6 and a denominator greater than -3

Why?

because negative 5 is greater than negative 6 and negative 2 is greater than negative 3

B.the number is greater than zero and has a numerator less than the denominator

C.The number is between 1.4 and 1.5 with a denominator less than zero

Why? because -145 over -100 is between the two number and is less than zero, it is between because it has 2 negative sign which is positive, therefore in between.

John Chua's Math Question

My question is #15 of chapter 2.4

Question is:

Kai needs to replace the strip of laminate that is glued to the vertical faces on a square tabletop. The table top has an area of 1.69m^2. What length of laminate does she need?

How to do this question.

So, you have to find the side length, since the shape is a square we shall square root the number.

so the answer is 1.3m.

to check if the answer is right you will have to multiply it by itself.

1.3x1.3=1.69

S.S The length of the laminate that she need is 1.3m.