To identify the items as expressions or equations, we look for the presence of an equality sign (=). An equation contains an equality sign, whereas an expression does not.
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24x³ = 18 - This is an Equation because it has an equality sign.
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7x + 3 = 1 - This is also an Equation as it contains an equality sign.
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44⋅−2x - This is an Expression because it does not contain an equality sign.
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2x² + 3x + 5 - This is an Expression as well, since there is no equality sign present.
In summary:
- Equations: 24x³ = 18, 7x + 3 = 1
- Expressions: 44⋅−2x, 2x² + 3x + 5