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Quadratic inequalities
Quadratic inequalities
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1 / 23
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Slide 1:
Slide
Wiskunde
Middelbare school
havo
Leerjaar 3
This lesson contains
23 slides
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interactive quizzes
and
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Items in this lesson
Quadratic inequalities
You need your Ipad and notebook
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
4
x
2
+
2
4
x
+
3
2
>
0
Slide 7 - Slide
13.6 Quadratic inequalities
or
or
4
x
2
+
2
4
x
+
3
2
>
0
4
x
2
+
2
4
x
+
3
2
=
0
x
2
+
6
x
+
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
4
x
2
+
2
4
x
+
6
>
−
2
6
4
x
2
+
2
4
x
+
3
2
=
0
x
2
+
6
x
+
8
=
0
(
x
+
2
)
(
x
+
4
)
=
0
x
+
2
=
0
x
+
4
=
0
x
=
−
2
x
=
−
4
x
<
−
4
x
>
−
2
timer
5:00
4
x
2
+
2
4
x
+
3
2
>
0
Slide 10 - Slide
13.6 Quadratic inequalities
4
x
2
+
2
4
x
+
3
2
>
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:
3
x
2
+
3
3
x
+
3
0
>
0
Slide 15 - Open question
Kwadratische ongelijkheid oplossen
3
x
2
+
3
3
x
+
3
0
>
0
Slide 16 - Slide
Kwadratische ongelijkheid oplossen
3
x
2
+
3
3
x
+
3
0
=
0
3
x
2
+
3
3
x
+
3
0
>
0
Slide 17 - Slide
Kwadratische ongelijkheid oplossen
3
x
2
+
3
3
x
+
3
0
=
0
x
2
+
1
1
x
+
1
0
=
0
3
x
2
+
3
3
x
+
3
0
>
0
Slide 18 - Slide
Kwadratische ongelijkheid oplossen
3
x
2
+
3
3
x
+
3
0
=
0
x
2
+
1
1
x
+
1
0
=
0
(
x
+
1
)
(
x
+
1
0
)
=
0
3
x
2
+
3
3
x
+
3
0
>
0
Slide 19 - Slide
Kwadratische ongelijkheid oplossen
of
3
x
2
+
3
3
x
+
3
0
=
0
x
2
+
1
1
x
+
1
0
=
0
(
x
+
1
)
(
x
+
1
0
)
=
0
x
+
1
=
0
x
+
1
0
=
0
3
x
2
+
3
3
x
+
3
0
>
0
Slide 20 - Slide
Kwadratische ongelijkheid oplossen
of
of
3
x
2
+
3
3
x
+
3
0
=
0
x
2
+
1
1
x
+
1
0
=
0
(
x
+
1
)
(
x
+
1
0
)
=
0
x
+
1
=
0
x
+
1
0
=
0
x
=
−
1
x
=
−
1
0
3
x
2
+
3
3
x
+
3
0
>
0
Slide 21 - Slide
Kwadratische ongelijkheid oplossen
of
of
3
x
2
+
3
3
x
+
3
0
=
0
x
2
+
1
1
x
+
1
0
=
0
(
x
+
1
)
(
x
+
1
0
)
=
0
x
+
1
=
0
x
+
1
0
=
0
x
=
−
1
x
=
−
1
0
3
x
2
+
3
3
x
+
3
0
>
0
Slide 22 - Slide
Zelfstandig werken
Werk aan opgaven 13.6
Overleg met je buurman/buurvrouw
Vragen? Steek je vinger op
Slide 23 - Slide
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