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Identify the following as an expression or an equation:

2x^3 - 4x^2
x = 3x^2 - 4
5^x = 25
2x + 2π

1 answer

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

  1. 2x^3 - 4x^2: This is an expression. It does not contain an equality sign.

  2. x = 3x^2 - 4: This is an equation. It contains an equality sign ("="), indicating that the left side is equal to the right side.

  3. 5^x = 25: This is also an equation. It has an equality sign, showing that 5x is equal to 25.

  4. 2x + 2π: This is an expression. It does not have an equality sign.

In summary:

  • Expressions: 2x^3 - 4x^2, 2x + 2π
  • Equations: x = 3x^2 - 4, 5^x = 25