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Slide 1: Slide
WiskundeMiddelbare schoolhavoLeerjaar 3

This lesson contains 29 slides, with interactive quizzes and text slides.

Items in this lesson

Slide 1 -Slide

Today
• Start (5 min)
• 'New' subject (15 min)
• Bettermarks (15 min)
• Second part explanation (15 min)
• Bettermarks (25 min)
• End lesson (5 min)

Solve for x:
4x+2=6x8

Solve for x:
4x+4=2x+34
timer
1:30

4x+4=2x+34

Slide 5 -Slide

To solve linear equations we use the balance method.

Example, solve:
Step 1: rearrange x terms
Step 2: rearrange constant terms
Step 3: divide
3x+8=x13
2x+8=13
2x=21
x=10.5

7(2x4)=19x+9

Slide 7 -Slide

Remove the brackets
8(6x1)
timer
1:00

Slide 9 -Slide

Bettermarks
• 15 minutes
• Bettermarks 13.1 (up to exersize 9 should be doable)
• Raise your finger if you have any questions or when you're finished
timer
15:00

Slide 10 -Slide

Go to LessonUp again

y=2x2+x7

Slide 12 -Slide

Find a, b and c in the formula
y=2x2+x7

Slide 13 -Open question

Find a, b and c in the formula
y=2x2+x7

y=2x2+x7
x=2ab±b24ac

3x2+18x+15=0

3x2+18x+15=0
a=3
b=18
c=15

3x2+18x+15=0
a=3
b=18
c=15
x=2ab±b24ac

Slide 18 -Slide

3x2+18x+15=0
a=3
b=18
c=15
x=2ab±b24ac
x=2  318±(18)24  3  15

Slide 19 -Slide

3x2+18x+15=0
a=3
b=18
c=15
x=2ab±b24ac
x=618±144
x=2  318±(18)24  3  15

Slide 20 -Slide

3x2+18x+15=0
a=3
b=18
c=15
x=2ab±b24ac
x=618±144
x=2  318±(18)24  3  15
x=618±12

Slide 21 -Slide

or

3x2+18x+15=0
a=3
b=18
c=15
x=2ab±b24ac
x=618±144
x=2  318±(18)24  3  15
x=618±12
x=618+12
x=61812

Slide 22 -Slide

or

or

3x2+18x+15=0
a=3
b=18
c=15
x=2ab±b24ac
x=618±144
x=2  318±(18)24  3  15
x=618±12
x=618+12
x=61812
x=66
x=630

Slide 23 -Slide

Solve for x:

or

or

or
3x2+18x+15=0
a=3
b=18
c=15
x=2ab±b24ac
x=618±144
x=2  318±(18)24  3  15
x=618±12
x=618+12
x=61812
x=66
x=630
x=1
x=5

Slide 24 -Slide

or
3x2+18x+15=0
a=3
b=18
c=15
x=2ab±b24ac
x=1
x=5
x=2  318±(18)24  3  15

Slide 25 -Slide

or
3x2+18x+15=0
a=3
b=18
c=15
x=2ab±b24ac
x=1
x=5
x=2  318±(18)24  3  15

Slide 26 -Slide

Question 10 in Bettermarks

Slide 27 -Slide

Bettermarks
• Bettermarks 13.1
• Until the end of the lesson
• Raise your finger if you have any questions or when you're finished