2TTO §11.4 AxB=0 PTI

§11.4 A x B = 0
All the 'factorising', done in paragraphs 1, 2 and 3,
will be used several times again.
So you see that a chapter is not a bunch of loose items!

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Slide 1: Slide
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This lesson contains 25 slides, with interactive quizzes and text slides.

Lesson duration is: 50 min

Items in this lesson

§11.4 A x B = 0
All the 'factorising', done in paragraphs 1, 2 and 3,
will be used several times again.
So you see that a chapter is not a bunch of loose items!

timer
5:00

Slide 2 -Slide

Recap on §11.2 and §11.3
To work your way much easier through §11.3,
first we look back shortly.

Slide 5 -Slide

+ Open your Notebook and Textbook on p.178/179:     §11.4 A x B = 0
+ Watch the equations from exercise 28
+ Compare them to those of exercise 35, p.183!

Slide 6 -Slide

Main difference between equations from 28 and 35 is:
.............................

Slide 7 -Mind map

+ The equations from 28 all end with:  ................. = 0
+ The equations from 35 don't end with .............. = 0.

This means that the equations from §11.4, today's paragraph, are easier to solve. Just watch the next slide for an example!

Slide 10 -Slide

Solve the equation below and key in your answers in the next slide.

Slide 11 -Slide

(2m -4)(m+7) = 0 My answer is:
A. 0 and -7 B. 2 and -7
C. 0 and 2 D. -2 and 7

A
0 and -7
B
2 and -7
C
0 and 2
D
-2 and 7

Slide 13 -Slide

Now a connection will be made between:

2nd:     graphs for quadratic formulas, so parabolas!
By doing 30 together, you will learn to do the 2nd half of the paragraph.

Slide 16 -Slide

Solution:

In the next slide, this equation will be solved.

SOLUTION:

SOLUTION:

Slide 19 -Slide

SOLUTION on the right:
(Do you remember that we found
the same outcome with the graph?)

Next comes
a bit of Theory,
summarising all this!

Slide 21 -Slide

This is a Photo question!
+ Make 31 a in your Notebook
+ Make a picture of your work
+ Send it in, in the next slide and
+ We get a collection of your Solutions!

Slide 22 -Slide

Send in your picture of 31a:

x2+3x18=0
(x+6)(x3)=0
X+6=0
x3=0
x=6
x=3
x+6=0

Slide 24 -Slide

Homework time
Make:      §11.4    A x B = 0