To evaluate the expression \( \sqrt{19} - \frac{3}{2} \), we will determine the types of numbers involved in the result.
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Evaluate \( \sqrt{19} \):
- The square root of 19 is an irrational number because 19 is not a perfect square.
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Evaluate \( \frac{3}{2} \):
- This is a rational number because it can be expressed as the fraction of two integers (3 and 2).
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Subtract \( \frac{3}{2} \) from \( \sqrt{19} \):
- The result of subtracting a rational number from an irrational number is always an irrational number.
Therefore, the expression \( \sqrt{19} - \frac{3}{2} \) will result in an irrational number.