2TH §11.4 AxB=0 (part 2)

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 2

What will we do today...

• §11.4 part 2
• Discuss S33 from the homework
• Together: exercise 32
• Homework: 33, 34 and C7

S33

S33

What's the connection between.........

1st:       Solving quadratic equations, and

2nd:     Graphs of quadratic formulas (parabolas)

By doing 32 together, you will learn to do the 2nd half of the paragraph.

TASK 2:

+ Think about it for a while.

Solution TASK 2: 

TASK 3:

a. Think about this for yourself.

b. Compare your answer with your neigbors.

TASK 3:

Solution:

In the next slide, this equation will be solved.

TASK 4:

1. Copy the equation in your Notebook and

2. Factorise it.

If you forgot how to Factorise a Trinomial,

look it up on p.179: Method!

TASK 4:

SOLUTION:

TASK 5:        

Make this task in your Notebook.

To refresh your memory:

at 32a we saw that the graph intersects the x-axis at x = -1 and x = 2.

Do you now get the same outcomes?!

TASK 5:        

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!  

TASK 6:            

This is a FOTOVRAAG !

+ Do 33a in your Notebook

+ Take a picture of your work

+ Send it in, in the next slide and

+ We get a collection of your Solutions!

33a:

For which values of x does the graph intersect the x-axis?

y=x​2​​+3x−18

Solution TASK 6:

                                or

x​2​​+3x−18=0

(x+6)(x−3)=0

X+6=0

x−3=0

x=−6

x=3

x+6=0

Homework - 11.4 part 2

§11.4    A x B = 0

Do exercises: 33, 34 and C7

1. Do it                

2. Correct it with the Solutions book

3. Send in your results in Classroom