How to rationalize a denominator | Exponent expressions and equations | ...

• Solucionario del libro MATEMATICAS ACADEMICAS 4ºESO (Editex):

https://drive.google.com/file/d/0BzbMH1hz77vrTjU2b2F2cGFXTU0/view?usp=sharing

• Libro ACADEMIC MATHEMATICS 4º ESO:

https://drive.google.com/file/d/0B8zalY3H37QycUxDWU5sOUJrZWM/view?usp=sharing

• Khan Academy video:

https://drive.google.com/open?id=0BzbMH1hz77vrTjU2b2F2cGFXTU0