2TH §11.4 AxB=0 (part 1)

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 2

What will we do today...

• Entry ticket
• New theory: §11.4 A x B = 0
• Homework: S30, 31, S33

Entry ticket

§11.4 A x B = 0

All the 'factorising' you have done in the first three paragraphs

will be used today for a special purpose.

So you see that a chapter is not a bunch of loose items!

Recap on §11.2 and §11.3

To work your way much easier through §11.3,

first we look back shortly.

Solving an Equation that is a Product:

A  x  B = 0.  This equation can only be 0, when

A = 0  or  B = 0     

In the next example the 'A' and the 'B' are expressions with 'x'.

Just watch!

Task 1:

Work out in your head the two Solutions:

The two values for m.  Key in your answers in the next slide

My answer is:
A. 0 and -7 B. 2 and -7
C. 0 and 2 D. -2 and 7

1. 0 and -7
2. 2 and -7
3. 0 and 2
4. -2 and 7

(Task and) Solution:

Homework

§11.4    A x B = 0

Do exercises: S30, 31, S33 

1. Do it                

2. Correct it with the Solutions book