Quadratics

After hearing that the quadratic formula is used constantly in calculus, you decide that it would be more efficient to just write a program for it! Write a program that solves the equation shown below:

$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

The $\pm$ sign represents two different equations, one with $+$ and one with $-$. Your answer will be both answers, separated by a comma and a space.

The first line will contain a single integer $n$ that indicates the number of data sets that follow. Each data set will contain three numbers (integer or decimal) on a single line, representing $a$, $b$, and $c$ respectively.

Output the two answers to the equation, rounded to the thousandths digit and separated by a comma and one space. The $+$ sign will be the first answer, then the $-$ sign will be the second. The solutions will always be real numbers.