Evaluate each expression or indicate that the root is not a real number.
$\frac{\sqrt7}{\sqrt3}$

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First, recognize that the expression involves a division of square roots: $ \frac{\sqrt{7}}{\sqrt{3}} $.

To simplify this expression, use the property of square roots that allows you to combine them: $ \frac{\sqrt{a}}{\sqrt{b}} = \sqrt{\frac{a}{b}} $.

Apply this property to the expression: $ \sqrt{\frac{7}{3}} $.

To simplify further, you can rationalize the denominator if needed, but in this case, the expression is already simplified as a single square root.

Finally, evaluate $ \sqrt{\frac{7}{3}} $ to determine if it is a real number. Since both 7 and 3 are positive, the expression under the square root is positive, confirming that the root is a real number.

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Simplifying Radicals

Simplifying radicals involves expressing a square root in its simplest form by factoring out perfect squares. For example, √12 can be simplified to 2√3 because 12 = 4 × 3 and √4 = 2. This process helps in making expressions easier to work with and compare.

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Adding & Subtracting Unlike Radicals by Simplifying

Rationalizing the Denominator

Rationalizing the denominator means eliminating any radicals from the denominator of a fraction. This is done by multiplying numerator and denominator by a suitable radical to create a rational number in the denominator. For example, to rationalize 1/√3, multiply by √3/√3 to get √3/3.

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Rationalizing Denominators

Properties of Square Roots and Fractions

The property √a/√b = √(a/b) allows combining or separating radicals in fractions. Understanding this helps in rewriting expressions like (√7)/(√3) as √(7/3), which can then be simplified or rationalized. This property is fundamental in manipulating radical expressions.

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