Generally, the quadratic formula will not produce whole numbers. In fact, that is the main advantage of the formula because it provides a way to "quickly" solve quadratic equations that cannot be factored because they lack whole number solutions. Assuming the a,b, and c's you've provided are correct, those quadratics will not have whole number answers, so your computed answer is probably correct.
There are lots of quadratic solvers available to check your work. I like
As it shows its steps as it goes through developing the solution, so you can see where you may have gone wrong.
I hope this helps. John