PLEASE HELP ASAP PLEASE !!

Multiplying an even number of negative numbers gives an answer that is choose from:

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?