1TH/vwo §9.3 Working with formulas

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 1

§ 9.3 Working with formulas

We've done so much with formulas, in § 9.1 and § 9.2:

+ shortening                + simplifying            + you name it!

However you might wonder:

What on earth can we DO with those formulas ?!

This burning question will be answered now!                            

y = 12 - 4x - 2x

1. y = 12 - 6x
2. y = 6x
3. y = -16x
4. y 18x

u = -3c + 4c - 6 - 7

1. u = -c - 13
2. u = c - 13
3. u = c - 13
4. u = -c + 13

In this paragraph we will practise how to calculate the result (= outcome) of a formula

Below are two examples.

Watch how the x sign returns, when filling in a number!

A little more about the multiplication sign follows.

And about the order of operations, too.

 Just watch the next slide!

Here is some THEORY.

Next slides shows an EXAMPLE of this theory.

And here is an example:

There are a few more complicated exercises in this paragraph.

-  That's why we now do one of them!

Making it easier to deal with 

the others on your own,

later this lesson.

-  Open your Notebook and get a pen, please.

Make 22a in your 

Notebook, now.

My final answer is: ........

SOLUTION:

Now make 22b in your Notebook. Good luck!

Your teacher asks a few of you for your answer.

Solution:   

Finally 

make 

22c in your Notebook.

Finally 

make 

22c in your Notebook.

Solution:

SOLUTIONjkhj

Solution:

Homework:  § 9.3

not 22, that we just did together.

HAVO and H/V:  Do the Support path! More is explained there.

So instead of 17 you do S17 and instead of 21 you do S21.

                 VWO:   make the Challenge path! 

                So instead of 20 and 22 do C5 and C6