To rewrite the cube root of 189 as the product of an integer and another irrational cube root, we can follow these steps:
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Prime Factorization of 189: First, we need to factor 189 into its prime components.
- 189 is odd, so it's not divisible by 2.
- The sum of the digits (1 + 8 + 9 = 18) is divisible by 3, so we can divide by 3: \[ 189 \div 3 = 63 \]
- Next, we factor 63, which is also divisible by 3: \[ 63 \div 3 = 21 \]
- Finally, we factor 21, which is also divisible by 3: \[ 21 \div 3 = 7 \]
- Thus, the complete prime factorization of 189 is: \[ 189 = 3^3 \times 7 \]
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Rewrite the Cube Root: Now we can express the cube root of 189: \[ \sqrt[3]{189} = \sqrt[3]{3^3 \times 7} \]
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Use the Property of Cubed Roots: We can separate the cube root using the multiplication property: \[ \sqrt[3]{189} = \sqrt[3]{3^3} \times \sqrt[3]{7} \]
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Simplify: We know that \(\sqrt[3]{3^3} = 3\). So we can rewrite the expression: \[ \sqrt[3]{189} = 3 \times \sqrt[3]{7} \]
Thus, the irrational cube root of 189 can be expressed as: \[ \sqrt[3]{189} = 3 \times \sqrt[3]{7} \]
This is your final answer, showing the composition of an integer and another irrational cube root.