6.4 Solving quadratic equations

• Wiskunde
• Middelbare school
• havo
• Leerjaar 3

Good morning!

Schedule: 

• 6.4 Learning goals 
• Theory
• Work on your homework 

6.4 Solving quadratic equations

At the end of the lesson I can: 

• Choose an appropriate method to solve a quadratic equation 
• Solve any quadratic equation 
• Generate equations from real examples 

Theory A: Three methods

What methods can we use to solve quadratic equations?

There are 3 methods. 

Methods to solve
quadratic equations

Theory A: Three methods

Theory B: Generating equations

What is the area of the flowerbed?

Theory B: Generating equations

What is the area of the flowerbed?

x

x

Theory B: Generating equations

The area of the flowerbed is 57 m2.

What equation can you write? 

x

x

Theory B: Generating equations

Solve  x2 + 16x = 57

x

x

Area = Length x width = 57 

Area = 12x + x² + 4x = x² + 16x

Take out your diaries 

Homework for Monday 5-4-2021:

Havo                  p. 21-24: #33-40(37)

What are you going to do? 

1. Practice homework questions on the board. 

2. Work on the homework myself to practice with the new theory. 

Let's Kahoot! 

Let's do a Kahoot! to practice with the three methods to solve quadratic equations!

6.4 Solving quadratic equations

At the end of the lesson I can: 

• Choose an appropriate method to solve a quadratic equation 
• Solve any quadratic equation 
• Generate equations from real examples