# 2Tvwo §11.3 Fact. trinomials (2)

§11.3 Factorising trinomials (2)
We divide up in two groups:
Show your Homework:    18   t/m.    21
+    understand it,         or
+    not

1 / 17
Slide 1: Slide
WiskundeMiddelbare schoolhavo, vwoLeerjaar 2

This lesson contains 17 slides, with text slides and 1 video.

Lesson duration is: 50 min

## Items in this lesson

§11.3 Factorising trinomials (2)
We divide up in two groups:
Show your Homework:    18   t/m.    21
+    understand it,         or
+    not

#### Slide 1 -Slide

§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.

#### Slide 2 -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!

#### Slide 3 -Slide

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.

#### Slide 4 -Slide

Why it works like this,
is explained in the next slides!

#### Slide 7 -Video

Now a task for you follows!

#### Slide 8 -Slide

- COPY the Task on the following slide,
- make the TABLE for the PRODUCT -like the one you just saw.

#### Slide 9 -Slide

Make the TABLE for:
timer
1:00

Solution:

#### Slide 11 -Slide

FACTORISE (making a good use of the TABLE!):
timer
0:30

#### Slide 12 -Slide

Solution:
The factorisation of:

is:
This is because:    -5 x -3 = 15 (the Product) and
-5 + -3 = -8 (the Sum)
h=(t5)(t3)

#### Slide 13 -Slide

- Make the Table for the Product
- Make the factorisation

#### Slide 14 -Slide

Note: do this with or without a TABLE!
timer
1:00

#### Slide 15 -Slide

Factorise:                           Solution:
So the Solution is:

#### Slide 16 -Slide

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!