# Refresh: lesson 1, 2

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Slide 1: Slide
WiskundeMiddelbare schoolvwoLeerjaar 3

This lesson contains 31 slides, with interactive quizzes, text slides and 1 video.

## Items in this lesson

Lesson 1

#### Slide 4 -Slide

Find the axis of symmetry using

y=x26x+10
x=2ab

#### Slide 5 -Open question

and find the vertex that belongs with this function

y=x26x+10

#### Slide 6 -Open question

Find the axis of symmetry using

y=x28x+12
x=2ab

#### Slide 7 -Open question

and find the vertex that belongs with this function

y=x28x+12

#### Slide 8 -Open question

Finding the axis of symmetry
Left you can see the graph of

You can find the x-coordinates where the parabola intersects the x-axis bij solving

-> x(x+4)=0
-> x=0 or x+4 = 0
x= 0 or  x = -4
The axis of symmetry is lying in the middle of these points , so at x=-2
f(x)=x2+4x
x2+4x=0

#### Slide 9 -Slide

Find the axis of symmetry

y=(x+5)(x3)

#### Slide 10 -Open question

and find the vertex

y=(x+5)(x3)

#### Slide 11 -Open question

Find the axis of symmetry

y=2x(x3)

#### Slide 12 -Open question

and find the vertex
y=2x(x3)

#### Slide 14 -Video

Complete the square
y=x2+12x25

#### Slide 15 -Open question

Complete the square and find the axis of symmetry
y=x22x+14

#### Slide 16 -Open question

Lesson 2
3. I can explain from f(x) = a(x-s)(x-t) the characteristics of a, s and t

4. I can read of the points of intersection with the x-axis and use these to find the axis of symmetry and the coordinates of the vertex

#### Slide 18 -Slide

Give the points of intersection with the x-axis from the function
f(x)=(x+2)(x3)

Up or downward?
f(x)=(x+2)(x3)

#### Slide 20 -Open question

Give the points of intersection with the x-axis from the function
g(x)=2(x+2)(x3)

Up or downward?
g(x)=2(x+2)(x3)

#### Slide 22 -Open question

Give the points of intersection with the x-axis from the function
h(x)=2(x2)(x+3)

Up or downward?
h(x)=2(x2)(x+3)

#### Slide 24 -Open question

witch function is the narrowest f(x) or g(x)?
f(x)=(x+2)(x3)
g(x)=2(x+2)(x3)

#### Slide 25 -Open question

witch function is the narrowest f(x) or g(x)?
f(x)=(x+2)(x3)
g(x)=21(x+2)(x3)

#### Slide 26 -Open question

witch function is the narrowest f(x) or g(x)?
f(x)=2(x+2)(x3)
g(x)=2(x+2)(x3)

#### Slide 28 -Slide

The graph of the function f(x)=2(x-s)(x-t) passes through the points (-6,0) and (3,0)

1. Write down the correct formula.

#### Slide 29 -Open question

The function from the slide earlier is f(x)=2(x+6)(x-3)

2. Write down the equation for the axis of symmetry

#### Slide 30 -Open question

From the graph of the function f(x)=2(x+6)(x-3) the equation for the axis of symmetry is y= -4.5

3. Calculate the coordinates of the vertex