8-4 Quadratic equations

• Wiskunde
• Middelbare school
• havo
• Leerjaar 3

8-4 Quadratic equations

What you need: - Textbook, writingbook, iPad - Pen, pencil, geotriangle - Calculator

Schoolbags in the cuboard

Phones in the phonebag

Bluetooth 

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- VPN off

                         Lesson goals

Choosing the easiest way to solve a quadratic equation.

26a

1. x=1,83 or 3.83
2. x=-1,83 or 3.83
3. x=1,83 or -3.83
4. no solution

26b

1. t=7 or t=1
2. t=-7 or t=1
3. t=7 or t=-1
4. no solution

26c

1. x=2 or x=6
2. x=-2 or x=6
3. x=2 or x=-6
4. no solution

26d

1. r=2 or r=1
2. r=2 or r=-1
3. r=-2 or r=-1
4. no solution

26e

1. p=2,37 or p=3,37
2. p=2,37 or p=-3,37
3. p=-2,37 or p=3,37
4. no solution

26f

1. x=-2,32 or x=-4,32
2. x=-2,32 or x=4,32
3. x=2,32 or x=-4,32
4. no solution

Try on your own

1, 2, 5 and 7

RULES:

• In your writingbook
• Use: Textbook
• Discussion when you are stuck is allowed

Extra excercise: none

Challenge: none

Now try: 27, 28