Identify each expression as a polynomial or not a polynomial. For each polynomial, give the degree and identify it as a monomial, binomial, trinomial, or none of these.See Example 1. 9

Verified step by step guidance

1. Step 1: Understand the definition of a polynomial. A polynomial is an expression consisting of variables and coefficients, involving only the operations of addition, subtraction, multiplication, and non-negative integer exponents of variables.
2. Step 2: Analyze the given expression '9'. This expression is a constant term with no variables.
3. Step 3: Determine if '9' fits the definition of a polynomial. Since it is a constant term, it can be considered a polynomial.
4. Step 4: Identify the degree of the polynomial. The degree of a constant polynomial is 0 because there are no variables with exponents.
5. Step 5: Classify the polynomial. Since it consists of only one term, it is a monomial.

Key Concepts

Polynomial Definition

A polynomial is a mathematical expression consisting of variables raised to non-negative integer powers and coefficients. It can include constants and can be expressed in the form of a sum of terms, where each term is a product of a coefficient and a variable raised to a power. Examples include expressions like 3x^2 + 2x + 1, which is a polynomial, and 4/x, which is not.

Degree of a Polynomial

The degree of a polynomial is the highest power of the variable in the expression. It provides insight into the polynomial's behavior and shape when graphed. For instance, in the polynomial 5x^3 + 2x^2 - x + 7, the degree is 3, indicating that the term with the highest exponent dominates the polynomial's behavior as x approaches infinity.

Classification of Polynomials

Polynomials can be classified based on the number of terms they contain. A monomial has one term (e.g., 4x), a binomial has two terms (e.g., x^2 + 3), and a trinomial has three terms (e.g., x^2 + 2x + 1). If a polynomial has more than three terms, it is typically referred to as 'none of these' in classification terms.