Implement the function *findRoots* to find the roots of the quadratic equation: ax^{2} + bx + c = 0.

The roots of the quadratic equation can be found with the following formula:

For example, the roots of the equation 2x^{2} + 10x + 8 = 0 are -1 and -4.

- Example case: Wrong answer
- Equal roots: Wrong answer
- Distinct roots: Wrong answer

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