# Chapter 6: Quadratic equations and inequalities - prior knowledge

Good morning!
When you come in the classroom:
1. Grab a marker
2. Write your name on the piece of paper
3. Fold the paper into a name card
1 / 12
Slide 1: Tekstslide
WiskundeMiddelbare schoolhavo, vwoLeerjaar 3

In deze les zitten 12 slides, met tekstslides.

Lesduur is: 40 min

## Onderdelen in deze les

Good morning!
When you come in the classroom:
1. Grab a marker
2. Write your name on the piece of paper
3. Fold the paper into a name card

#### Slide 1 -Tekstslide

Schedule:
• Chapter 6 learning goals
• Prior knowledge learning goals
• 5 minute quiz
• Prior knowledge theory OR start on your homework

#### Slide 2 -Tekstslide

Ch. 6: Quadratic equations and inequalities
At the end of this chapter I can:
- calculate the discriminant of a quadratic equation
- find out how many solutions a quadratic equations has
- solve quadratic equations with different methods
- explain what a interval is
- find the solutions to a quadratic inequality from graphs

#### Slide 3 -Tekstslide

Prior knowledge: Simplifying and factorising
At the end of this lesson I can:
- simplify by multiplying out of brackets
- factorize quadratic equations by taking the common factor out of brackets
- factorize with the product-sum-method

#### Slide 4 -Tekstslide

Time to energize!

#### Slide 5 -Tekstslide

5 minute quiz
1. (x + 2)2 =

2. (3x - 7) · 5x + 6y =

3. (x-4)(x+4) =

4. 8x2 + 2x =

5. x2 + 5x + 6 =
Simplify:                                     Factorize:
timer
5:00

#### Slide 6 -Tekstslide

1. (x+2)= (x+2)·(x+2) =          2. (3x - 7) · 5x + 6y =                 3. (x-4)(x+4) =

x+ x·2 + 2·x + 2·2 =                   3x · 5x - 7 · 5x + 6y =            x2+  x · 4 -  4 · x -4 · 4 = x2 + 2x + 2x + 4 =                         15x2 -35x + 6y                            x2 - 4x + 4x - 16 =
x2 + 4x + 4                                                                                                x2 - 16

#### Slide 7 -Tekstslide

4. 8x+ 2x =                                          5. x2 + 5x + 6 =
x(8x + 2)                                                  (x+2)(x+3)
product
sum
1  ·  6
7
2  ·  3
5
Put the common factor outside
the brackets
Use the product-sum-method

#### Slide 8 -Tekstslide

What to do?
I want to revise the simplifying and factorising theory with ma'am
OR
I want to work on the homework by myself.

#### Slide 9 -Tekstslide

Homework for tomorrow 11-3-2021:
Havo                 p. 8-9 #1-7

#### Slide 10 -Tekstslide

Prior knowledge: Simplifying and factorising
At the end of this lesson I can:
- simplify by multiplying out of brackets
- factorize quadratic equations by taking the common factor out of brackets
- factorize with the product-sum-method

#### Slide 11 -Tekstslide

See you tomorrow!