Simplify. Rationalize the denominator.

2

5–
3

1 answer

It looks like you want to simplify the expression \( \frac{2}{5 - \sqrt{3}} \) and rationalize the denominator. Here are the steps to achieve that:

  1. Multiply by the conjugate of the denominator: The conjugate of \( 5 - \sqrt{3} \) is \( 5 + \sqrt{3} \). We will multiply the numerator and the denominator by this conjugate.

\[ \frac{2}{5 - \sqrt{3}} \cdot \frac{5 + \sqrt{3}}{5 + \sqrt{3}} \]

  1. Perform the multiplication:
  • In the numerator: \[ 2(5 + \sqrt{3}) = 10 + 2\sqrt{3} \]

  • In the denominator: \[ (5 - \sqrt{3})(5 + \sqrt{3}) = 5^2 - (\sqrt{3})^2 = 25 - 3 = 22 \]

  1. Combine the results:

\[ \frac{10 + 2\sqrt{3}}{22} \]

  1. Simplify the expression:

We can simplify this fraction by dividing both terms in the numerator by 2:

\[ = \frac{5 + \sqrt{3}}{11} \]

So, the simplified and rationalized form of the original expression \( \frac{2}{5 - \sqrt{3}} \) is

\[ \frac{5 + \sqrt{3}}{11} \]

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