2Tvwo Ch 11 Refresh

chapter 11 is called:
factorising

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chapter 11 is called:
factorising

Slide 1 - Diapositive

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!)

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Removing single brackets
Write y = 2t(5t - 3) without brackets.




            

Slide 3 - Diapositive

Removing double brackets

 y = (2n - 7)(n + 1)

                                  

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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 
4x2+8=44

Slide 5 - Diapositive

Solving (quadratic) equations

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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 - Diapositive

Solve:
x2+2=7
timer
1:00

Slide 9 - Question ouverte

SOLVE:             +2 = 7.  Place a card over 
           = 5
x =              or       x =       
x2
x2
5
5
5

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Slide 11 - Diapositive

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 - Diapositive

Homework time
- Make and correct §11          Refresh

- hand in your CORRECTED Solutions on GC.

Slide 15 - Diapositive