Table of contents
- 0. Review of Algebra4h 16m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 6m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 19m
- 10. Combinatorics & Probability1h 45m
0. Review of Algebra
Multiplying Polynomials
2:13 minutes
Problem 3
Textbook Question
Textbook QuestionIn Exercises 1–4, is the algebraic expression a polynomial? If it is, write the polynomial in standard form. (2x+3)/x
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Polynomial Definition
A polynomial is an algebraic expression that consists of variables raised to non-negative integer powers and coefficients. It can be expressed in the form of a sum of terms, where each term is a product of a constant (coefficient) and a variable raised to a whole number exponent. For example, 3x^2 + 2x + 1 is a polynomial, while 1/x or x^-1 is not.
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Standard Form of a Polynomial
The standard form of a polynomial is when the terms are arranged in descending order of their exponents. This means that the term with the highest degree appears first, followed by terms of lower degrees. For instance, the polynomial 4x^3 + 2x^2 - x + 5 is in standard form, as the terms are ordered from the highest degree (3) to the lowest (0).
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Rational Expressions
A rational expression is a fraction where both the numerator and the denominator are polynomials. In the expression (2x + 3)/x, the numerator is a polynomial, but the denominator is a variable, which means the entire expression is not a polynomial. Understanding the distinction between rational expressions and polynomials is crucial for determining whether an expression qualifies as a polynomial.
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