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
Radical Expressions
Problem 84
Textbook Question
Simplify each radical. Assume all variables represent positive real numbers. √24m⁶n⁵
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1
First, break down the number 24 into its prime factors: \(24 = 2^3 \times 3\).
Next, express the expression under the square root as \(\sqrt{24m^6n^5} = \sqrt{2^3 \times 3 \times m^6 \times n^5}\).
Apply the property of square roots that \(\sqrt{a \times b} = \sqrt{a} \times \sqrt{b}\) to separate the terms: \(\sqrt{2^3} \times \sqrt{3} \times \sqrt{m^6} \times \sqrt{n^5}\).
Simplify each square root: \(\sqrt{2^3} = 2\sqrt{2}\), \(\sqrt{m^6} = m^3\), and \(\sqrt{n^5} = n^2\sqrt{n}\).
Combine the simplified terms: \(2m^3n^2\sqrt{6n}\).
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Radical Simplification
Radical simplification involves reducing a radical expression to its simplest form. This process includes identifying perfect squares within the radicand (the number or expression inside the radical) and extracting them outside the radical. For example, √24 can be simplified by recognizing that 24 = 4 × 6, where 4 is a perfect square.
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Properties of Exponents
Understanding the properties of exponents is crucial for simplifying expressions involving variables. For instance, when simplifying m⁶, we can express it as (m³)², allowing us to take m³ outside the radical. This property helps in managing the powers of variables when they are part of a radical expression.
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Combining Radicals
Combining radicals refers to the process of merging like terms after simplification. When simplifying expressions like √(a) + √(a), we can combine them into a single radical. This concept is essential for ensuring that the final expression is as concise as possible, which is a key goal in radical simplification.
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