Algebra Concepts and Expressions

This Algebra 2 lesson by Kirk Wier introduces algebraic expressions, covering basic definitions, evaluating expressions, understanding zeros, and working with rational and multivariable expressions. The lesson emphasizes the importance of understanding terminology and practicing calculations without a calculator. It concludes with a summary of key concepts and the significance of these foundational topics for future learning.

What type of calculator is recommended for this Algebra 2 course?

• Casio FX-991EX

• TI-84 Plus

• TI Inspire

• TI Inspire CAS

What is a variable in algebra?

• A type of equation

• A mathematical operation

• A letter representing an unknown quantity

• A fixed number

How many terms are in the expression 5x^2 - 2x + 10?

• 4

• 3

• 2

• 1

What is the value of the expression 5x^2 - 2x + 10 when x = -2?

• 34

• 24

• 54

• 44

Why is x = 4 considered a zero of the expression x^2 - 2x - 8?

• It makes the expression undefined

• It makes the expression zero

• It makes the expression negative

• It makes the expression positive

What are the zeros of the expression x^2 - 64?

• 64 and -64

• 0 and 64

• 8 and -8

• 8 and 64

What is the value of the rational expression x - 10 / x + 2 when x = 0?

• 0

• 5

• Undefined

• -5

Why is division by zero undefined?

• It results in infinity

• It results in a negative number

• It results in zero

• It cannot be defined as a number

What is the zero of the expression x + 6 / x - 4?

• x = -4

• x = 4

• x = -6

• x = 6

What is the value of the expression 5x^2 - 12y^3 for x = 3 and y = -2?

• 59

• 49

• 39

• 69