## anilorap Group Title hola,,, question... can I use the rational root test to proof that the cubic root of 2 and square root 3 are irrationals? 2 years ago 2 years ago

1. satellite73 Group Title

sure if you consider the polynomial $x^3-2$ the rational roots can only be $\pm 1,\pm2$ and by inspection neither of those work.

2. anilorap Group Title

cool.. yea i did that... thanks satellite

3. satellite73 Group Title

yw

4. satellite73 Group Title

i guess if you want a real proof you have to know that the root exists, but that is clear because this is a continuous function that takes on both positive and negative values

5. anilorap Group Title

waitt

6. anilorap Group Title

they are really asking me prove in detail

7. anilorap Group Title

what u mean the root exist?