Exploring Equations with Square and Cube Roots

The video tutorial covers equations involving square and cube roots, emphasizing the concept of inverse operations. It explains how square roots can have both positive and negative solutions due to the property of multiplying negatives. The tutorial also delves into cube roots, illustrating how they differ from square roots, particularly in handling negative values. Through examples, the video demonstrates how to solve equations with both positive and negative roots, providing a comprehensive understanding of these mathematical concepts.

What is the inverse operation of squaring a number?

• Square root

• Multiplication

• Addition

• Division

Tags

CCSS.8.EE.A.2

If the square of a number is 49, what are the possible values of the number?

• Only 7

• 49 and -49

• 7 and -7

• 7 and 0

Tags

CCSS.8.EE.A.2

What is the cube root of 343?

• 7

• 14

• 49

• 21

Tags

CCSS.8.EE.A.2

Why does negative 7 not work as a cube root of 343?

• Because negative 7 times negative 7 times negative 7 is not 343

• Because 343 is not a perfect cube

• Because cube roots cannot be negative

• Because negative 7 is not a real number

Tags

CCSS.8.EE.A.2

What is the cube root of 512?

• 7

• 6

• 9

• 8

Tags

CCSS.8.EE.A.2

Why does negative 8 not work as a cube root of 512?

• Because cube roots cannot be negative

• Because 512 is not a perfect cube

• Because negative 8 is not a real number

• Because negative 8 times negative 8 times negative 8 is not 512

Tags

CCSS.8.EE.A.2

Which of the following equations has both -6 and 6 as possible values of C?

• C = -6

• C^2 = 36

• C^3 = 216

• C = 6

Tags

CCSS.8.EE.A.2

What is the result of 6 times 6 times 6?

• 216

• 1296

• 36

• 18

What is the result of -6 times -6 times -6?

• 1296

• Negative 216

• 36

• 216

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What should you do if you need further help with the material?

• Give up

• Search online

• Ask the teacher for help

• Rewatch the video

Tags

CCSS.8.EE.C.7B