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Select the correct answer.

What is the simplest equivalent form of this expression?
[tex]\[ \sqrt[3]{\frac{8 x^6 y^9}{27 y^3 z^3}} \][/tex]

A. [tex]\(\frac{2 x^3 y}{3 x}\)[/tex]
B. [tex]\(\frac{2 x^2 y^2}{3 x}\)[/tex]
C. [tex]\(\frac{2 x^6 y^2}{3 y^3 x^3}\)[/tex]
D. [tex]\(\frac{8 x^3 y^2}{27 z^3}\)[/tex]


Sagot :

To simplify the given expression, we start with:
[tex]\[ \sqrt[3]{\frac{8 x^6 y^9}{27 y^3 z^3}} \][/tex]

Step 1: Simplify the expression inside the cube root.
First, separate the constants and the variables:

For the constants:
[tex]\[ \frac{8}{27} = \frac{2^3}{3^3} \][/tex]

For the variable with [tex]\(x\)[/tex]:
[tex]\[ x^6 \text{ remains as it is} \][/tex]

For the variables with [tex]\(y\)[/tex]:
[tex]\[ \frac{y^9}{y^3} = y^{9-3} = y^6 \][/tex]

For the variable with [tex]\(z\)[/tex]:
[tex]\[ z^3 \text{ remains as it is} \][/tex]

So now we can rewrite the expression inside the cube root as:
[tex]\[ \frac{2^3 x^6 y^6}{3^3 z^3} \][/tex]

Step 2: Take the cube root of the simplified expression.
The cube root of a fraction [tex]\(\frac{a}{b}\)[/tex] can be written as [tex]\(\frac{\sqrt[3]{a}}{\sqrt[3]{b}}\)[/tex].

Applying this property, we get:
[tex]\[ \sqrt[3]{\frac{2^3 x^6 y^6}{3^3 z^3}} = \frac{\sqrt[3]{2^3 x^6 y^6}}{\sqrt[3]{3^3 z^3}} \][/tex]

Now, extract the cube roots:
[tex]\[ \sqrt[3]{2^3 x^6 y^6} = 2 x^2 y^2 \][/tex]
and
[tex]\[ \sqrt[3]{3^3 z^3} = 3 z \][/tex]

So, the entire expression simplifies to:
[tex]\[ \frac{2 x^2 y^2}{3 z} \][/tex]

Double check with the options given:
A. [tex]\(\frac{2 x^3 y}{3 x}\)[/tex]
B. [tex]\(\frac{2 x^2 y^2}{3 x}\)[/tex]
C. [tex]\(\frac{2 x^6 y^2}{3 y^3 x^3}\)[/tex]
D. [tex]\(\frac{8 x^3 y^2}{27 z^3}\)[/tex]

The simplified form matches none of the options precisely as given in the initial problem. However, correcting the form and verifying, we see:

The accurate and simplified answer matches:
[tex]\[ \frac{2 x^2 y^2}{3 z} \][/tex]

Please verify this against the choices properly; there may have been an issue with options provided.

Based on accurate calculation and understanding of the cube roots:

The closest correct form should have been:

[tex]\[ B. \frac{2 x^2 y^2}{3 z} \][/tex]