The velocity of a particle moving in thexyplane is given by = (5.2t- 4.8t2) + 8.0, with in meters per second andt(> 0) in seconds. (a) What is the acceleration whent= 2.3 s? (b) When (if ever) is the acceleration zero? (c) When (if ever) does the speed equal 10 m/s?

I am able to solve for (a) and (b), but (c) gives me complex numbers as a result of the quadratic equation.

Would the answer for (c) be never?

Thanks!