Quadratic inequalities

Quadratic inequalities
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Slide 1: Slide
WiskundeMiddelbare schoolhavoLeerjaar 3

This lesson contains 23 slides, with interactive quizzes and text slides.

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Quadratic inequalities
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Slide 1 - Slide

Today
  • Start (5 min)
  • New subject (15 min)
  • Bettermarks (20 min)
  • Exercise together  (15 min)
  • Bettermarks (20 min)
  • End lesson (5 min) 

Slide 2 - Slide

Quadratic inequalities
                               <

A. Between the points of intersection
B. Outside the points of intersection

f(x)
g(x)
timer
0:30

Slide 3 - Slide

g(x) < f(x)
A
Between the p.o.i.
B
Outside the p.o.i.

Slide 4 - Quiz

Quadratic inequalities
                               <

A. Between the points of intersection
B. Outside the points of intersection

f(x)
g(x)

Slide 5 - Slide

Quadratic inequalities
                               <

Mark the parts of the x-axis where the above is correct

f(x)
g(x)

Slide 6 - Slide

13.6 Quadratic inequalities
4x2+24x+32>0

Slide 7 - Slide

13.6 Quadratic inequalities





or                                                     
or                                                               
4x2+24x+32>0
4x2+24x+32=0
x2+6x+8=0
(x+2)(x+4)=0
x+2=0
x+4=0
x=2
x=4

Slide 8 - Slide

13.6 Quadratic inequalities
Step 1: Rearrange the formula so it says > 0
Step 2: Solve the equation (find the zeroes)
Step 3: See if it's a upward or downward opening parabola
Step 4: Make the conclusion
                
timer
2:00

Slide 9 - Slide

13.6 Quadratic inequalities




or                                                             
or                                                                    
So                      or                                                                                 
4x2+24x+6>26
4x2+24x+32=0
x2+6x+8=0
(x+2)(x+4)=0
x+2=0
x+4=0
x=2
x=4
x<4
x>2
timer
5:00
4x2+24x+32>0

Slide 10 - Slide

13.6 Quadratic inequalities
4x2+24x+32>0

Slide 11 - Slide

Checkpoint C13
05-03

Slide 12 - Slide

2-test C13

Slide 13 - Slide

Bettermarks
  • Work on 13.6
  • 20 min
  • Raise your finger if you have any questions or when you're finished
  • Communicate in English please
timer
20:00

Slide 14 - Slide

Los op:
3x2+33x+30>0

Slide 15 - Open question

Kwadratische ongelijkheid oplossen
3x2+33x+30>0

Slide 16 - Slide

Kwadratische ongelijkheid oplossen
3x2+33x+30=0
3x2+33x+30>0

Slide 17 - Slide

Kwadratische ongelijkheid oplossen
3x2+33x+30=0
x2+11x+10=0
3x2+33x+30>0

Slide 18 - Slide

Kwadratische ongelijkheid oplossen
3x2+33x+30=0
x2+11x+10=0
(x+1)(x+10)=0
3x2+33x+30>0

Slide 19 - Slide

Kwadratische ongelijkheid oplossen





of                                                     
                                                  
3x2+33x+30=0
x2+11x+10=0
(x+1)(x+10)=0
x+1=0
x+10=0
3x2+33x+30>0

Slide 20 - Slide

Kwadratische ongelijkheid oplossen





of                                                     
of                                                               
3x2+33x+30=0
x2+11x+10=0
(x+1)(x+10)=0
x+1=0
x+10=0
x=1
x=10
3x2+33x+30>0

Slide 21 - Slide

Kwadratische ongelijkheid oplossen





of                                                     
of                                                               
3x2+33x+30=0
x2+11x+10=0
(x+1)(x+10)=0
x+1=0
x+10=0
x=1
x=10
3x2+33x+30>0

Slide 22 - Slide

Zelfstandig werken
  • Werk aan opgaven 13.6
  • Overleg met je buurman/buurvrouw
  • Vragen? Steek je vinger op

Slide 23 - Slide