QuestionAugust 26, 2025

13. Is sqrt (1,815) rational? Explain

13. Is sqrt (1,815) rational? Explain
13. Is sqrt (1,815) rational? Explain

Solution
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Answer

No, \sqrt{1815} is not rational. Explanation 1. Define Rational Number A rational number can be expressed as a fraction \frac{p}{q} where p and q are integers, and q \neq 0. 2. Check Perfect Square Determine if 1815 is a perfect square. Calculate the square root of 1815 using a calculator or estimation. If it results in an integer, then \sqrt{1815} is rational. 3. Calculate Square Root \sqrt{1815} \approx 42.58, which is not an integer. 4. Conclusion Since \sqrt{1815} is not an integer, it cannot be expressed as a fraction of two integers.

Explanation

1. Define Rational Number<br /> A rational number can be expressed as a fraction $\frac{p}{q}$ where $p$ and $q$ are integers, and $q \neq 0$.<br /><br />2. Check Perfect Square<br /> Determine if 1815 is a perfect square. Calculate the square root of 1815 using a calculator or estimation. If it results in an integer, then $\sqrt{1815}$ is rational.<br /><br />3. Calculate Square Root<br /> $\sqrt{1815} \approx 42.58$, which is not an integer.<br /><br />4. Conclusion<br /> Since $\sqrt{1815}$ is not an integer, it cannot be expressed as a fraction of two integers.
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