# Polynomials

Algebraic expressions are created by combining numbers and variables using arithmetic operations: addition, subtraction, multiplication, division, and exponentiation.

Using all but division, you can create an expression called a polynomial by adding or subtracting terms.

Question 1 of 2

1. Identify the coefficient of –3r4 + 5

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B.
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Question 1 of 2

Question 2 of 2

2. Identify the exponent of 9a17+12b.

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B.
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D.

Question 2 of 2

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Algebraic expressions are created by combining numbers and variables using arithmetic operations: addition, subtraction, multiplication, division, and exponentiation.

Using all but division, you can create an expression called a polynomial by adding or subtracting terms. Polynomials are very useful in applications from science and engineering to business.

Monomials (and polynomials in general) may have more than one variable, but in this unit, you will only work with single variable polynomials.

Monomials

The basic building block of a polynomial is a monomial. A monomial is one term and can be a number, a variable, or the product of a number and variables with an exponent. The number part of the term is called the coefficient.

The coefficient can be any real number, including 0. The exponent of the variable must be a whole number—0, 1, 2, 3, and so on. A monomial cannot have a variable in the denominator or a negative exponent.

The value of the exponent is the degree of the monomial. Remember that a variable that appears to have no exponent really has an exponent of 1. And a monomial with no variable has a degree of 0. (Since x0 has the value of 1 if x ≠ 0, a number such as 3 could also be written 3×0, if x ≠ 0. as 3×0 = 3 • 1 = 3.) Example
Problem:  Identify the coefficient, variable, and exponent of the monomial .