Identify the following as an expression or an equation.(4 points)

Question

5x^2−8x+2

−3x^3=82

2x−5=4

21⋅−3^x

Answer 1

Let's classify each of the provided mathematical statements as an expression or an equation:

1. 5x² - 8x + 2 - This is an expression. It does not include an equals sign.

2. −3x³ = 82 - This is an equation. It includes an equals sign.

3. 2x − 5 = 4 - This is also an equation. It includes an equals sign.

4. 21 ⋅ −3^x - This is an expression. It does not include an equals sign.

In summary:

• 5x² - 8x + 2: Expression
• −3x³ = 82: Equation
• 2x − 5 = 4: Equation
• 21 ⋅ −3^x: Expression