This question is for a test grade, it'll a tremendous help if someone could give me the steps to solving this problem :)

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

Sorry guys but as you have a small brain

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years