posted by huda .
how to find the answer an its graph???
y = x^6-10x^5-7x^4+80x^3+12x^2-192x
you know any rational roots will be factors of 192. There appear to be none except x=0.
If you visit wolframalpha.com and enter the formula, you will find one root near x=10, but that is the only real nonzero root.
To see what happens near x=0, try visiting
set the x range -10 to 10
y -1000 to 1000