2TH Ch 11 Refresh

Planning Chapter 11
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This lesson contains 15 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 50 min

Items in this lesson

Planning Chapter 11

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chapter 11 is called:
factorising

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Refresh
Before you do the Refresh paragraph R3 until R9 on p.168/169,
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.




            

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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

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Solving (quadratic) equations

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Next task ...
1. Copy the task
2. Solve it by the Card Method
3. Send it in!
4. REMEMBER: there are TWO Solutions!

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Solve:

x2+2=7
A
x2=5
B
x=5
C
x=5
D
x=5or5

Slide 10 - Quiz

SOLVE:             +2 = 7.  
           = 5
x =              or       x =       
x2
x2
5
5

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Shorten if possible:
3s + 6
A
9s
B
18s
C
not possible

Slide 12 - Quiz

Shorten if possible:
5c x 6c = ....
A
11c
B
30c2
C
30c
D
not possible

Slide 13 - Quiz

Solving (quadratic) equations





Solutions should always be exact!
(Not a rounded off approximation)

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Homework time
- Chapter 11  Do the Refresh exercises 3 until 9 (skip R6)

- upload your CORRECTED Solutions in Classroom 

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