Solving by factorising jko

Solving by factorising TVWO 2

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Slide 1: Tekstslide
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In deze les zitten 37 slides, met interactieve quizzen en tekstslides.

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Solving by factorising TVWO 2

Slide 1 -Tekstslide

Lesson goals
• Solve equations with factorisation.
• Factorize a difference of two squares.

Slide 2 -Tekstslide

A x B = 0
In this case A = 0 or B = 0

A quadratic equation that is not written in the form A x B = 0, can be solved by factorising.

Slide 3 -Tekstslide

Solve the following equations:
timer
6:00

a
A
x=0 or x=-4
B
x=0 or x=4
C
x=0 or x=-2
D
x=0 or x=2

b
A
x=0 or x=-3
B
x=0 or x=3
C
x=0 or x=-1/3
D
x=0 or x=1/3

c
A
x=0 or x=-2.5
B
x=0 or x=2.5
C
x=0 or x=-5
D
x=0 or x=5

d
A
x=3 or x=6
B
x=3 or x=-6
C
x=-3 or x=-6
D
x=-3 or x=6

e
A
x=7 or x=2
B
x=-7 or x=2
C
x=7 or x=-2
D
x=-7 or x=-2

f
A
x=3 or x=5
B
x=-3 or x=5
C
x=3 or x=-5
D
x=-3 or x=-5

timer
3:00

a
A
y=x221
B
y=x210x21
C
y=x2+10x21
D
y=x2+4x21

b
A
y=x29
B
y=x2+9
C
y=x26x+9
D
y=x23x+9

c
A
y=x214x49
B
y=x2+49+14x
C
y=x2+49x+49
D
y=14x2+x+49

d
A
y=x225
B
y=x2+25
C
y=x250x25
D
y=x2+50x+25

e
A
y=x2+4
B
y=x24
C
y=x28x4
D
y=x2+8x+4

f
A
y=x22x1
B
y=x2+1
C
y=x2
D
y=x21

Slide 19 -Tekstslide

Factorizing a difference of squares
x281=0
(x9)(x+9)=0
x9=0
x+9=0
or
x=9
x=9

a
A
x=-10
B
x=0 or x=10
C
x=0 or x=-10
D
x=10 or x=-10

b
A
x=0 or x=-9
B
x=9 or x=9
C
x=9 or x=-9
D
x=9

c
A
x=0 or x=-1
B
x=-1
C
x=1
D
x=1 or x=-1

d
A
x=4 or x = -4
B
x=0 or x = -4
C
x=4
D
x = -4

Slide 26 -Tekstslide

1, 2, 5 and 7
Challenge: zero flaws...

Slide 28 -Tekstslide

Write down the area of
segments I, II and III
The area of the tiled path is
34m2.

Slide 29 -Tekstslide

How wide is the tiled path
A
34 m
B
-17m
C
17m
D
2m

x2+15x=34

x2+15x=34
x2+15x34=0

x2+15x=34
x2+15x34=0
(x2)(x+17)=0

x2+15x=34
x2+15x34=0
(x2)(x+17)=0
x2=0orx+17=0

x2+15x=34
x2+15x34=0
(x2)(x+17)=0
x2=0orx+17=0
x=2orx=17