Math Problem Statement

Use the product property for radicals to simplify the following radical expressions as much as possible. Assume all variables represent positive numbers. Use \sqrt(x) for \sqrt(x) and \root(x)(y) for \root(x)(y). \root(3)(320)=

Solution

To simplify \root(3)(320)\root(3)(320), we use the product property of radicals:

\root(3)(ab)=\root(3)(a)\root(3)(b)\root(3)(a \cdot b) = \root(3)(a) \cdot \root(3)(b)

Step 1: Prime factorize 320320

320=265320 = 2^6 \cdot 5

Step 2: Group the factors into perfect cubes

  • A perfect cube has powers divisible by 3. From 262^6, we can write 26=(23)22^6 = (2^3)^2.
  • The expression becomes: 320=(23)25320 = (2^3)^2 \cdot 5

Step 3: Simplify the cube root

Using the product property of radicals: \root(3)(320)=\root(3)((23)25)=\root(3)((23)2)\root(3)(5)\root(3)(320) = \root(3)((2^3)^2 \cdot 5) = \root(3)((2^3)^2) \cdot \root(3)(5)

  • Simplify \root(3)((23)2)=22=4\root(3)((2^3)^2) = 2^2 = 4.
  • \root(3)(5)\root(3)(5) remains as it is because 5 is not a perfect cube.

Final Answer:

\root(3)(320)=4\root(3)(5)\root(3)(320) = 4 \cdot \root(3)(5)

If you have questions, let me know! Here are 5 related problems to practice:

  1. Simplify \root(3)(540)\root(3)(540).
  2. Simplify \root(3)(108)\root(3)(108).
  3. Simplify (72)\sqrt(72).
  4. Simplify \root(4)(512)\root(4)(512).
  5. Simplify \root(3)(8x6)\root(3)(8x^6).

Tip: Always check for the largest perfect power that can be factored out when simplifying radicals!

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Math Problem Analysis

Mathematical Concepts

Radicals
Simplification of Radicals
Prime Factorization

Formulas

Product Property of Radicals: \root(n)(a \cdot b) = \root(n)(a) \cdot \root(n)(b)

Theorems

Properties of Exponents (used in factoring and grouping)
Concept of Perfect Powers (e.g., cubes for cube roots)

Suitable Grade Level

Grades 8-10