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Factoring trinomials
13.3: Factoring trinomials
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Wiskunde
Middelbare school
havo
Leerjaar 3
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13.3: Factoring trinomials
You need your Ipad and notebook
Slide 1 - Slide
Today
Start (5 min)
Recap (15 min)
Bettermarks (20 min)
Practice togheter (15 min)
Bettermarks (20 min)
End lesson (5 min)
Slide 2 - Slide
Factorizing trinomials
x
2
+
8
x
+
1
2
Slide 3 - Slide
Factor
x
2
+
9
x
+
2
0
timer
1:00
A
(
x
+
9
)
(
x
+
2
0
)
B
(
x
+
1
0
)
(
x
+
2
)
C
(
x
+
3
)
(
x
+
3
)
D
(
x
+
4
)
(
x
+
5
)
Slide 4 - Quiz
Factor
x
2
+
1
0
x
+
1
6
timer
1:00
A
(
x
+
2
)
(
x
+
5
)
B
(
x
+
8
)
(
x
+
2
)
C
(
x
+
4
)
(
x
+
4
)
D
(
x
+
1
)
(
x
+
1
0
)
Slide 5 - Quiz
Factor
x
2
+
x
−
6
timer
1:00
A
(
x
−
2
)
(
x
−
3
)
B
(
x
+
2
)
(
x
−
3
)
C
(
x
−
2
)
(
x
+
3
)
D
(
x
+
2
)
(
x
+
3
)
Slide 6 - Quiz
Factor
x
2
−
6
x
+
9
timer
1:00
A
(
x
+
3
)
(
x
+
3
)
B
(
x
−
3
)
(
x
−
3
)
C
(
x
−
9
)
(
x
−
1
)
D
(
x
+
6
)
(
x
−
3
)
Slide 7 - Quiz
Factor
x
2
+
1
5
x
+
5
0
timer
2:00
Slide 8 - Open question
Solving trinomials:
x
2
+
9
x
+
2
0
=
0
Slide 9 - Slide
Solving trinomials:
x
2
+
9
x
+
2
0
=
0
(
x
+
4
)
(
x
+
5
)
=
0
Slide 10 - Slide
Solving trinomials:
or
x
2
+
9
x
+
2
0
=
0
(
x
+
4
)
(
x
+
5
)
=
0
x
+
4
=
0
x
+
5
=
0
Slide 11 - Slide
Solving trinomials:
or
or
x
2
+
9
x
+
2
0
=
0
(
x
+
4
)
(
x
+
5
)
=
0
x
+
4
=
0
x
+
5
=
0
x
=
−
4
x
=
−
5
Slide 12 - Slide
13.3 Factoring trinomials
Solving a trinomial using the product-sum method:
Example, solve:
Step 1: Factorize
Step 2: Make equations or
Step 3: Solve the equations or
x
2
+
9
x
+
2
0
=
0
(
x
+
4
)
(
x
+
5
)
=
0
x
+
4
=
0
x
+
5
=
0
x
=
−
4
x
=
−
5
timer
4:00
Slide 13 - Slide
Slide 14 - Slide
Bettermarks
Work on 13.3
Raise your finger if you have any questions or when you're finished
Communicate in English please
timer
20:00
Slide 15 - Slide
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