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Simplify the following expression:

[tex]\[ \frac{\sqrt{2}}{\sqrt{6} - \sqrt{2}} \][/tex]


Sagot :

To solve the expression [tex]\(\frac{\sqrt{2}}{\sqrt{6}-\sqrt{2}}\)[/tex], we will rationalize the denominator. When rationalizing the denominator, we aim to eliminate the square root terms in the denominator.

Here's the step-by-step process:

1. Identify the conjugate of the denominator:
The denominator is [tex]\(\sqrt{6} - \sqrt{2}\)[/tex]. Its conjugate is [tex]\(\sqrt{6} + \sqrt{2}\)[/tex].

2. Multiply the numerator and the denominator by the conjugate of the denominator:
[tex]\[ \frac{\sqrt{2}}{\sqrt{6} - \sqrt{2}} \times \frac{\sqrt{6} + \sqrt{2}}{\sqrt{6} + \sqrt{2}} = \frac{\sqrt{2}(\sqrt{6} + \sqrt{2})}{(\sqrt{6} - \sqrt{2})(\sqrt{6} + \sqrt{2})} \][/tex]

3. Simplify the numerator:
[tex]\[ \sqrt{2}(\sqrt{6} + \sqrt{2}) = \sqrt{2} \cdot \sqrt{6} + \sqrt{2} \cdot \sqrt{2} \][/tex]
[tex]\[ = \sqrt{12} + \sqrt{4} \][/tex]
[tex]\[ = 2\sqrt{3} + 2 \][/tex]

4. Simplify the denominator using the difference of squares:
[tex]\[ (\sqrt{6} - \sqrt{2})(\sqrt{6} + \sqrt{2}) = (\sqrt{6})^2 - (\sqrt{2})^2 \][/tex]
[tex]\[ = 6 - 2 \][/tex]
[tex]\[ = 4 \][/tex]

5. Combine the simplified numerator and the denominator:
[tex]\[ \frac{2\sqrt{3} + 2}{4} \][/tex]

6. Simplify by dividing both terms in the numerator by the denominator:
[tex]\[ \frac{2\sqrt{3}}{4} + \frac{2}{4} \][/tex]
[tex]\[ = \frac{\sqrt{3}}{2} + \frac{1}{2} \][/tex]

Therefore, the simplified expression is:

[tex]\[ \frac{\sqrt{2}}{\sqrt{6} - \sqrt{2}} = \frac{1}{2} + \frac{\sqrt{3}}{2} \][/tex]