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2Tvwo Ch 11 Refresh
chapter 11 is called:
factorising
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Slide 1:
Slide
Wiskunde
Middelbare school
vwo
Leerjaar 2
This lesson contains
15 slides
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interactive quizzes
and
text slides
.
Lesson duration is:
50 min
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Items in this lesson
chapter 11 is called:
factorising
Slide 1 - Slide
Refresh
Before you do the Refresh paragraph on p.164/165,
let's have a Recap on the exercises.
It is about:
- removing brackets (from Ch 9, that you recently worked on) and
- solving equations (which you practiced longer ago!)
Slide 2 - Slide
Removing single brackets
Write y = 2t(5t - 3) without brackets.
Slide 3 - Slide
Removing double brackets
y = (2n - 7)(n + 1)
Slide 4 - Slide
Next is ...
Solving equations.
Linear equations like: 24 = 2c + 8 you know from Ch9.
However Quadratic Equations like:
you studied much longer ago. This comes now!
The KEYWORD for Solving it is: CARD METHOD
4
x
2
+
8
=
4
4
Slide 5 - Slide
Solving (quadratic) equations
Slide 6 - Slide
Slide 7 - Slide
Next task ...
Is a FOTOVRAAG!
1. Copy the task
2. Solve it by the Card Method
3. Take a picture and send it in!
4. REMEMBER: there are TWO Solutions!
Slide 8 - Slide
Solve:
x
2
+
2
=
7
timer
1:00
Slide 9 - Open question
SOLVE: +2 = 7. Place a card over
= 5
x = or x =
x
2
x
2
√
5
−
√
5
√
5
Slide 10 - Slide
Slide 11 - Slide
Shorten if possible:
3s + 6
A
9s
B
18s
C
not possible
Slide 12 - Quiz
Shorten if possible:
5c x 6c = ....
A
11c
B
30 c squared
C
30c
D
not possible
Slide 13 - Quiz
Solving (quadratic) equations
Solutions should always be exact!
(Not a rounded off approximation)
Slide 14 - Slide
Homework time
- Make and correct §11 Refresh
- hand in your CORRECTED Solutions on GC.
Slide 15 - Slide
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