IDNLearn.com offers a seamless experience for finding and sharing knowledge. Get the information you need from our community of experts, who provide detailed and trustworthy answers.

Which of the following expressions can be used to rationalize the fraction below?

[tex]\[ \frac{15}{\sqrt{3}} \][/tex]

A. 5
B. [tex]\(\frac{\sqrt{3}}{\sqrt{3}}\)[/tex]
C. [tex]\(\frac{\sqrt{5}}{\sqrt{5}}\)[/tex]
D. [tex]\(\frac{15}{\sqrt{3}}\)[/tex]


Sagot :

To rationalize the fraction [tex]\(\frac{15}{\sqrt{3}}\)[/tex], we need to eliminate the square root in the denominator. To do this, we multiply both the numerator and the denominator by the square root in the denominator, which is [tex]\(\sqrt{3}\)[/tex]. This process is known as rationalizing the denominator.

Here's the step-by-step procedure:

1. Start with the fraction:
[tex]\[ \frac{15}{\sqrt{3}} \][/tex]

2. Multiply the numerator and the denominator by [tex]\(\sqrt{3}\)[/tex]:
[tex]\[ \frac{15}{\sqrt{3}} \times \frac{\sqrt{3}}{\sqrt{3}} \][/tex]

3. Perform the multiplication:
[tex]\[ \frac{15 \cdot \sqrt{3}}{\sqrt{3} \cdot \sqrt{3}} \][/tex]

4. Simplify the denominator, since [tex]\(\sqrt{3} \cdot \sqrt{3} = 3\)[/tex]:
[tex]\[ \frac{15 \cdot \sqrt{3}}{3} \][/tex]

5. Simplify the fraction:
[tex]\[ \frac{15 \sqrt{3}}{3} = 5 \sqrt{3} \][/tex]

Therefore, to rationalize the fraction [tex]\(\frac{15}{\sqrt{3}}\)[/tex], you multiply by [tex]\(\frac{\sqrt{3}}{\sqrt{3}}\)[/tex].

Looking at the given options:
A. [tex]\( 5 \)[/tex]
B. [tex]\( \frac{\sqrt{3}}{\sqrt{3}} \)[/tex]
C. [tex]\( \frac{\sqrt{5}}{\sqrt{5}} \)[/tex]
D. [tex]\( \frac{15}{\sqrt{3}} \)[/tex]

The correct answer is [tex]\( B. \frac{\sqrt{3}}{\sqrt{3}} \)[/tex].
Your participation means a lot to us. Keep sharing information and solutions. This community grows thanks to the amazing contributions from members like you. IDNLearn.com provides the best answers to your questions. Thank you for visiting, and come back soon for more helpful information.