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2TH §4.2 Adding and subtracting Square Roots

Entry Ticket

Calculate if possible and without using a calculator

1 / 13

Slide 1: Slide

WiskundeMiddelbare schoolvwoLeerjaar 2

This lesson contains 13 slides, with interactive quizzes and text slides.

Lesson duration is: 50 min

Items in this lesson

Entry Ticket

Calculate if possible and without using a calculator

Slide 1 - Slide

§4.2 Adding and subtracting square roots ...

is on the menu today!

Slide 2 - Slide

Recap: Opposite numbers

Slide 3 - Slide

Adding and subtracting square roots

Slide 4 - Slide

Adding and subtracting square roots

....... works the same as adding (+) and subtracting (-) like terms:

Slide 5 - Slide

Calculate

\sqrt ​ 3 ​ ​ ​ + \sqrt ​ 3 ​ ​ ​ + \sqrt ​ 3 ​ ​ ​ + \sqrt ​ 3 ​ ​ ​ =

A

\sqrt ​ 12 ​ ​ ​

B

\sqrt ​ 81 ​ ​ ​

C

4 \sqrt ​ 3 ​ ​ ​

D

3 \sqrt ​ 4 ​ ​ ​

Slide 6 - Quiz

Adding and subtracting square roots

You can only add up (+) and subtract (-) like terms

Slide 7 - Slide

Slide 8 - Slide

Write as short as possible

y = \sqrt ​ x ​ ​ ​ + \sqrt ​ 5 ​ ​ ​ + \sqrt ​ x ​ ​ ​ + \sqrt ​ 7 ​ ​ ​

A

y = 2 \sqrt ​ x ​ ​ ​ + \sqrt ​ 12 ​ ​ ​

B

y = 2 \sqrt ​ x ​ ​ ​ + \sqrt ​ 5 ​ ​ ​ + \sqrt ​ 7 ​ ​ ​

C

y = \sqrt ​ 2 x + 12 ​ ​ ​

D

y = \sqrt ​ 35 x^{​ 2 ​ ​} ​ ​ ​

Slide 9 - Quiz

Adding and subtracting square roots

Writing formulas as short as possible with square roots

works the same as with like terms.

Slide 10 - Slide

Write as short as possible

P = 15 \sqrt ​ a ​ ​ ​ + 6 \sqrt ​ b ​ ​ ​ + 5 \sqrt ​ a ​ ​ ​ - 2 \sqrt ​ b ​ ​ ​

A

P = 20 \sqrt ​ a ​ ​ ​ + 8 \sqrt ​ b ​ ​ ​

B

P = 24 \sqrt ​ a b ​ ​ ​

C

P = 20 \sqrt ​ a ​ ​ ​ + 4 \sqrt ​ b ​ ​ ​

D

cannot be written any shorter

Slide 11 - Quiz

Homework

Do §4.2 exercises 10, 11, 12, 13 and 14

Check your answers with the solution book!

Slide 12 - Slide

What did you learn today?

Slide 13 - Mind map

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