I'm trying to execute a code but i am having the following error:

Error, cannot determine if this expression is true or false: 257^(1/2) < -79999999/10000000

The entire procedure is downloadable here: https://www.mediafire.com/file/3iiwmipruhtlhzx/Newton+Bairstow-+proyecto1.mw/file

If someone can help me to find a solution I'll be very thankful.