G8-MATH-L9 Algebraic Expressions and Identities

What is an algebraic expression?

• A number only
• A combination of numbers and variables
• A constant
• An equation

Which of the following is a monomial?

• 3x + 2
• 5xy
• 7x - 4
• 2x + 3y - 1

What is the coefficient in the term 8xy?

• 8
• x
• y
• xy

If y = 3, what is the value of the expression 2y - 5?

• 1
• -1
• 3
• 5

Which of the following expressions is a binomial?

• x + 2
• 3x - 4y + 5
• 2xy + 3x - 5y
• 5x^2 + 7x + 8

What is the result of multiplying (x + 2) by (x - 3)?

• x² - x - 6
• x² - x + 6
• x² - 6
• x² - 5

Which identity represents the square of a binomial?

• (a + b)² = a² + 2ab + b²
• (a - b)² = a² - 2ab + b²
• (a + b)(a - b) = a² - b²
• All of the above

What is the product of 3x and 4y?

• 12xy
• 7xy
• 12x + 4y
• 7x + 4y

If the expression is 5x + 3y, what are the like terms?

• 5x and 3y
• 5x and 5y
• 3y and 3y
• None of the above

What is the value of the expression 4x + 5 when x = 2?

• 13
• 9
• 10
• 8