# 2TH Ch 11 Refresh

Planning Chapter 11
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Slide 1: Slide
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This lesson contains 15 slides, with interactive quizzes and text slides.

Lesson duration is: 50 min

## Items in this lesson

Planning Chapter 11

#### Slide 1 -Slide

chapter 11 is called:
factorising

#### Slide 2 -Slide

Refresh
Before you do the Refresh paragraph R3 until R9 on p.168/169,
let's have a Recap on the exercises.
- removing brackets (from Ch 9, that you recently worked on) and
- solving equations (which you practiced longer ago!)

#### Slide 3 -Slide

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

#### Slide 4 -Slide

Removing double brackets

y = (2n - 7)(n + 1)

#### Slide 5 -Slide

Next is ...
Solving equations.
Linear equations like:   24 = 2c + 8  you know from Ch9.
you studied much longer ago. This comes now!
The KEYWORD for Solving it is: CARD METHOD
4x2+8=44

#### Slide 8 -Slide

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

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

#### 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
30c2
C
30c
D
not possible

#### Slide 13 -Quiz

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

#### Slide 14 -Slide

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