It says find all real zeros of the function f(x) = x^5-x^4-7x^3+11x^2-8x+12. I searched all over but everywhere I check is saying to use this theorem thing with the negative signs but our teacher didn't teach us about that, she told us to use a graphing calculator. But I'm confused because the only answers I could find were 2, and -3 but since the highest exponent is 5, shouldn't I have 5 answers?