2TH §11.3 Factorising trinomials

• Wiskunde
• Middelbare school
• havo, vwo
• Leerjaar 2

§11.3 Factorising trinomials

We divide up in two groups:

Please open up your Notebook and 

Show your Homework:    18   t/m.    21

Together with your teacher it will be made clear if you

+    understand it,         or   

+    not

§11.3 Factorising trinomials (2)

We divide up in two groups:

GROUP A:   You have succesfully made   18 t/m 21 for today. 

In that case: You can Finish the paragraph:     making exercises 22, 23, 24, 25  

 

GROUP B: see next slide.

§11.3 Factorising trinomials 

We divide up in two groups:

GROUP B:   You have NOT succesfully made   18 t/m 21 for today. 

You do NOT understand §11.3 yet.

In that case, you get the following explanation!

So group A, now make your choice:

You MAY NOW START MAKING:

         22, 23, 24, 25.  and choose between making  S19+S20  or  C5+C6.

Of course you may also follow this LessonUp first, to learn more

about it!

Why it works like this,

is explained in the next slides!

Now a task for you follows!

Task 1:

- open your Notebook

- COPY the Task on the following slide,

- make the TABLE for the PRODUCT -like the one you just saw. 

Task 1: 

Make the TABLE for:

Solution:

Task 2: 

FACTORISE (making a good use of the TABLE!):

Solution:

The factorisation of: 

is:

This is because:    -5 x -3 = 15 (the Product) and

                                      -5 + -3 = -8 (the Sum)

h=(t−5)(t−3)

Task 3: see next slide!

The same as with task1:

- Copy the Task in your Notebook

- Make the Table for the Product 

- Make the factorisation

Task 3:   Factorise:

Note: do this with or without a TABLE!

Factorise:                           Solution:

So the Solution is:

Homework GROUP B:

Make, correct and 

hand in, in Google Classroom:          §11.3  

18. t/m. 25

TIP: if it is still difficult for you, consult the METHOD on p.175 again!