Practice square roots (t2a)

Roots:

brackets

& formulas

February 10th, 2022

t2a

11:30

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\sqrt ​ ​ ​ ​

1 / 27

Slide 1: Tekstslide

WiskundeMiddelbare schoolvwoLeerjaar 1

In deze les zitten 27 slides, met interactieve quizzen en tekstslides.

Lesduur is: 60 min

Onderdelen in deze les

Roots:

brackets

& formulas

February 10th, 2022

t2a

11:30

At home?

Camera ON

Log into the LessonUp with the code below!

\sqrt ​ ​ ​ ​

Slide 1 - Tekstslide

Schedule

Announcements 5 min
Review: simplifying square roots 10 min
Square roots in brackets 10 min
Practice + check 15 min
Square root formulas 10 min
Tiny practice quiz 20 min

Slide 2 - Tekstslide

Announcements

Quiz square roots: 25% TOMORROW
Statistics Project: 75%

Slide 3 - Tekstslide

Anonymous poll (be honest!):
Did you do all your homework for this lesson?

Yes

Slide 4 - Poll

Review question 1:
Simplify.

3 \sqrt ​ 5 ​ ​ ​ - 7 \sqrt ​ 5 ​ ​ ​

4 \sqrt ​ 5 ​ ​ ​

- 4 \sqrt ​ 5 ​ ​ ​

- 4

Cannot be simplified

Slide 5 - Quizvraag

Review question 2:
Simplify.

5 \sqrt ​ 5 ​ ​ ​ + 3 \sqrt ​ 7 ​ ​ ​

8 \sqrt ​ 12 ​ ​ ​

8 \sqrt ​ 35 ​ ​ ​

15 \sqrt ​ 12 ​ ​ ​

Cannot be simplified

Slide 6 - Quizvraag

Review question 3:
Simplify.

3 \sqrt ​ 2 ​ ​ ​ \cdot 4 \sqrt ​ 6 ​ ​ ​

7 \sqrt ​ 8 ​ ​ ​

7 \sqrt ​ 12 ​ ​ ​

12 \sqrt ​ 8 ​ ​ ​

12 \sqrt ​ 12 ​ ​ ​

Slide 7 - Quizvraag

Review question 4:
Factorize.

\sqrt ​ 50 ​ ​ ​

25 \sqrt ​ 2 ​ ​ ​

2 \sqrt ​ 25 ​ ​ ​

5 \sqrt ​ 2 ​ ​ ​

2 \sqrt ​ 5 ​ ​ ​

Slide 8 - Quizvraag

Review question 5:
Factorize and simplify. Write it down!

\sqrt ​ 50 ​ ​ ​ + \sqrt ​ 18 ​ ​ ​

8 \sqrt ​ 2 ​ ​ ​

34 \sqrt ​ 2 ​ ​ ​

\sqrt ​ 68 ​ ​ ​

Cannot be simplified

Slide 9 - Quizvraag

Intended Learning Outcomes

At the end of the lesson you can...

Work out brackets with square roots in them
Do all sorts of calculations with square roots

Slide 10 - Tekstslide

Single brackets

Letters

Square roots

Slide 11 - Tekstslide

Double brackets

Letters

Square roots

Slide 12 - Tekstslide

Simplify.

\sqrt ​ 2 ​ ​ ​ (3 \sqrt ​ 5 ​ ​ ​ + 4)

6 \sqrt ​ 5 ​ ​ ​ + 4

6 \sqrt ​ 5 ​ ​ ​ + 4 \sqrt ​ 2 ​ ​ ​

3 \sqrt ​ 10 ​ ​ ​ + 4

3 \sqrt ​ 10 ​ ​ ​ + 4 \sqrt ​ 2 ​ ​ ​

Slide 13 - Quizvraag

Simplify.

(\sqrt ​ 3 ​ ​ ​ + 2) (\sqrt ​ 3 ​ ​ ​ - 2)

- 1

1

\sqrt ​ 3 ​ ​ ​ - 4

\sqrt ​ 3 ​ ​ ​ - 2

Slide 14 - Quizvraag

Practice

~15 min, discuss 49ad afterwards

Basic route

48, 49 (brackets)

62, 63, 64, 66, 67 (later: formulas)

Advanced route

49, 50, (51) (brackets)

63, 64, 65, 66, 68 (later: formulas)

Slide 15 - Tekstslide

Slide 16 - Tekstslide

What is the graph of a quadratic formula called again?

Linear graph

Hyperbola

Parabola

Curving graph

Slide 17 - Quizvraag

You know two things:
- The shape of the graph of a quadratic formula
- A square root is the 'opposite' of a square
With that in mind, describe what you think the
graph of the formula on the right would look like.

y = \sqrt ​ x ​ ​ ​

Slide 18 - Open vraag

Let's build the graph

y = \sqrt ​ x ​ ​ ​

Slide 19 - Tekstslide

www.geogebra.org/graphing

Slide 20 - Tekstslide

What will the graph of thís formula look like then?

y = - \sqrt ​ x ​ ​ ​

A normal parabola again

A line

The same half sideways parabola, but going left instead of right

The same half sideways parabola, but going down instead of up

Slide 21 - Quizvraag

Explain why the following statement is/isn't true:

is the same as

y = 3 \sqrt ​ 16 x ​ ​ ​

y = 48 \sqrt ​ x ​ ​ ​

Slide 22 - Open vraag

True or not true?

is the same as

y = 4 + \sqrt ​ 9 x ​ ​ ​

y = 4 + 3 \sqrt ​ x ​ ​ ​

True

Not true

Slide 23 - Quizvraag

True or not true?

is the same as

y = 4 + 3 \sqrt ​ x ​ ​ ​

y = 7 \sqrt ​ x ​ ​ ​

True

Not true

Slide 24 - Quizvraag

Practice...

...or practice quiz?

Basic route

48, 49 (brackets)

62, 63, 64, 66, 67 (formulas)

Advanced route

49, 50, (51) (brackets)

63, 64, 65, 66, 68 (formulas)

Slide 25 - Tekstslide

Slide 26 - Tekstslide

Tiny practice quiz

Copy the exercises in your
notebook and solve them
Discuss afterwards
Done early? Continue with:

a . (5 \sqrt ​ 2 ​ ​ ​) - 2 (\sqrt ​ 5 ​ ​ ​)^{​ 2 ​ ​}

b . 4 \sqrt ​ 3 ​ ​ ​ + 6 \sqrt ​ 7 ​ ​ ​ - 5 \sqrt ​ 3 ​ ​ ​

c . - 2 \sqrt ​ 2 ​ ​ ​ \cdot 7 \sqrt ​ 3 ​ ​ ​ + 9 \sqrt ​ 6 ​ ​ ​

d . 2 \sqrt ​ 75 ​ ​ ​ + 4 \sqrt ​ 27 ​ ​ ​

e . (\sqrt ​ 7 ​ ​ ​ + \sqrt ​ 8 ​ ​ ​)^{​ 2 ​ ​}

Slide 27 - Tekstslide

Practice square roots (t2a)

Onderdelen in deze les

Slide 1 - Tekstslide

Slide 2 - Tekstslide

Slide 3 - Tekstslide

Slide 4 - Poll

Slide 5 - Quizvraag

Slide 6 - Quizvraag

Slide 7 - Quizvraag

Slide 8 - Quizvraag

Slide 9 - Quizvraag

Slide 10 - Tekstslide

Slide 11 - Tekstslide

Slide 12 - Tekstslide

Slide 13 - Quizvraag

Slide 14 - Quizvraag

Slide 15 - Tekstslide

Slide 16 - Tekstslide

Slide 17 - Quizvraag

Slide 18 - Open vraag

Slide 19 - Tekstslide

Slide 20 - Tekstslide

Slide 21 - Quizvraag

Slide 22 - Open vraag

Slide 23 - Quizvraag

Slide 24 - Quizvraag

Slide 25 - Tekstslide

Slide 26 - Tekstslide

Slide 27 - Tekstslide

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