Rewrite the irrational cube root 48−−√3 as a product of an integer and another irrational cube root.

1 answer

To rewrite \( \sqrt[3]{48} \) as a product of an integer and another irrational cube root, we need to factor \( 48 \) into its prime factors.

We can express \( 48 \) as follows:

\[ 48 = 16 \times 3 = 4^2 \times 3 = 2^4 \times 3 \]

Now, we can take the cube root:

\[ \sqrt[3]{48} = \sqrt[3]{16 \times 3} = \sqrt[3]{16} \cdot \sqrt[3]{3} \]

Next, simplify \( \sqrt[3]{16} \):

\[ \sqrt[3]{16} = \sqrt[3]{2^4} = 2^{4/3} = 2^{1 + 1/3} = 2 \cdot \sqrt[3]{2} \]

Substituting this back into the expression, we get:

\[ \sqrt[3]{48} = 2 \cdot \sqrt[3]{2} \cdot \sqrt[3]{3} = 2 \cdot \sqrt[3]{6} \]

Therefore, we can write:

\[ \sqrt[3]{48} = 4 \cdot \sqrt[3]{6} \]

Thus, the rational cube root of \( 48 \) is rewritten as:

\[ \sqrt[3]{48} = 4 \cdot \sqrt[3]{6} \]