Identify monomials, binomials and trinomials from the following algebraic expressions :
`-7`

Answer

To identify whether the expression `-7` is a monomial, binomial, or trinomial, we can follow these steps:

### Step 1: Understand the definitions
- **Monomial**: An algebraic expression that contains only one term. It can be a constant, a variable, or a product of constants and variables.
- **Binomial**: An algebraic expression that contains exactly two terms, separated by a plus or minus sign.
- **Trinomial**: An algebraic expression that contains exactly three terms, separated by plus or minus signs.

### Step 2: Analyze the expression `-7`
- The expression `-7` consists of only one term, which is the constant `-7`.

### Step 3: Classify the expression
- Since `-7` has only one term, it fits the definition of a monomial.

### Conclusion
- Therefore, the expression `-7` is a **monomial**.

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