2TH §11.3 Factorising trinomials

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

§11.3 Factorising trinomials

• Entry ticket: Factorising binomials
• New theory: Factorising trinomials
• Homework §11.3 Do exercises 22, 23, S24, S25

Entry ticket

Now a task for you will follow!

Task 1:

- open your Notebook

- COPY the Task on the following slide,

- make the TABLE for the PRODUCT and the SUM -like the one you just saw (page 179). 

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 task 1:

- 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 

§11.3 Do exercises 22, 23, S24, S25

TIP: if it is still difficult for you, consult the METHOD on p.179 again!