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MatemáticasMatemáticas1,308 views·Updated Jun 22, 2026·1 page

Racionalización de raíces cuadradas y cúbicas

J
Jesus Aranguren@jesusaranguren_zxrt

¿Alguna vez te has preguntado qué hacer cuando tienes una...

1
of 1
4-10-2016.

RACIONALIZACIÓN DE DENOMINADORES
Racionalizar significa quitar la raiz del denominada
- Con naucer sundradar

$
\frac{3}{\sqrt{2

Racionalización de Denominadores

Racionalizar significa quitar cualquier raíz del denominador de una fracción. Es como "limpiar" la parte de abajo para que quede más ordenada y fácil de trabajar.

Para las raíces cuadradas, multiplicas tanto el numerador como el denominador por la misma raíz. Por ejemplo: 32=322\frac{3}{\sqrt{2}} = \frac{3\sqrt{2}}{2} al multiplicar por 22\frac{\sqrt{2}}{\sqrt{2}}. ¡Súper sencillo!

Con raíces cúbicas o superiores, necesitas completar la potencia para eliminar la raíz. Si tienes 253\frac{2}{\sqrt[3]{5}}, multiplicas por 523523\frac{\sqrt[3]{5^2}}{\sqrt[3]{5^2}} para conseguir 22535\frac{2\sqrt[3]{25}}{5}.

Cuando aparecen sumas o restas en el denominador con raíces, usas el conjugado. Si tienes 23\sqrt{2}-\sqrt{3}, su conjugado es 2+3\sqrt{2}+\sqrt{3}. Al multiplicar por el conjugado, las raíces se eliminan como por arte de magia.

💡 Truco: El conjugado cambia el signo del medio. Si es suma, pasa a resta, y viceversa.

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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan SiOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha KlichAndroid user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

AnnaiOS user
MatemáticasMatemáticas1,308 views·Updated Jun 22, 2026·1 page

Racionalización de raíces cuadradas y cúbicas

J
Jesus Aranguren@jesusaranguren_zxrt

¿Alguna vez te has preguntado qué hacer cuando tienes una raíz cuadrada o cúbica en el denominador de una fracción? La racionalización de denominadoreses una técnica matemática que te permite eliminar estas raíces del denominador para simplificar las expresiones....

1
of 1
4-10-2016.

RACIONALIZACIÓN DE DENOMINADORES
Racionalizar significa quitar la raiz del denominada
- Con naucer sundradar

$
\frac{3}{\sqrt{2

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Racionalización de Denominadores

Racionalizar significa quitar cualquier raíz del denominador de una fracción. Es como "limpiar" la parte de abajo para que quede más ordenada y fácil de trabajar.

Para las raíces cuadradas, multiplicas tanto el numerador como el denominador por la misma raíz. Por ejemplo: 32=322\frac{3}{\sqrt{2}} = \frac{3\sqrt{2}}{2} al multiplicar por 22\frac{\sqrt{2}}{\sqrt{2}}. ¡Súper sencillo!

Con raíces cúbicas o superiores, necesitas completar la potencia para eliminar la raíz. Si tienes 253\frac{2}{\sqrt[3]{5}}, multiplicas por 523523\frac{\sqrt[3]{5^2}}{\sqrt[3]{5^2}} para conseguir 22535\frac{2\sqrt[3]{25}}{5}.

Cuando aparecen sumas o restas en el denominador con raíces, usas el conjugado. Si tienes 23\sqrt{2}-\sqrt{3}, su conjugado es 2+3\sqrt{2}+\sqrt{3}. Al multiplicar por el conjugado, las raíces se eliminan como por arte de magia.

💡 Truco: El conjugado cambia el signo del medio. Si es suma, pasa a resta, y viceversa.

We thought you’d never ask...

What is the Knowunity AI companion?

Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.

Where can I download the Knowunity app?

You can download the app in the Google Play Store and in the Apple App Store.

Is Knowunity really free of charge?

That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.

Most popular content: Racionalización del denominador

2

Most popular content in Matemáticas

9

Most popular content

9

Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.6/5App Store
4.7/5Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan SiOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha KlichAndroid user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

AnnaiOS user