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What are these graphs called?
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Slide 1: Woordweb
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In deze les zitten 12 slides, met interactieve quiz en tekstslides.

time-iconLesduur is: 50 min

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What are these graphs called?

Slide 1 - Woordweb

CH5 Quadratic Formulas
Quadratic formulas are the type of formulas you will use most often in Mathematics.
Working with quadratic formulas requires you to work precisely and neatly and you need the skills you've learned in previous chapters.

Slide 2 - Tekstslide

Recap: Order of Operations
When doing calculations, you have to follow the order of operations:
1. First calculate what is given between brackets.
2. Then calculate powers and roots.
3. Then multiply and divide from left to right.
4. Then add and subtract from left to right.

Slide 3 - Tekstslide

Slide 4 - Tekstslide

Recap: Square roots
The square root of 25 is 5, because the square of 5 is 25.

The square root of 6.25 is 2.5, because the square of 2.5 is 6.25

There is no square root of -16 (or any other negative number), because there is no number you can square to get a negative result

Slide 5 - Tekstslide

Recap: Writing formulas shorter
You can write formulas shorter by:
- multiplying factors
- combining like terms
- not writing down the multiplication sign between a number and a variable

Slide 6 - Tekstslide

Slide 7 - Tekstslide

Recap: Quadratic formulas
If a formula contains a the square of a variable (and not a higher exponent), it is called a quadratic formula.
The corresponding graph is called a parabola.

When filling in negative numbers for the variable in a quadratic formula you should use brackets, because you want to square the negative number, not take the opposite of a positive square.

Slide 8 - Tekstslide

Slide 9 - Tekstslide

Slide 10 - Tekstslide

Pen&Paper or Digital
For this chapter you will get to choose between doing most of your exercises on your iPad or in your notebook.
- If you work in your notebook, you can follow the studyplanner for your chosen path (support, standard or challenge). Check your answers with the solutions book, if you get an answer wrong, try answering the question again.
- If you work on the iPad, I will keep track of the time you spend on your exercises and how well you did on them.  Some exercises (such as drawing graphs) you will have to write in your notebook. Your answers will be checked for you. If you get an answer wrong, try answering the question again.

Slide 11 - Tekstslide

HW Monday
Make and correct §5.Refresh
(digital or from your book)

Slide 12 - Tekstslide