beecrowd | 1036
# Bhaskara's Formula

**Timelimit: 1**

Adapted by Neilor Tonin, URI Brazil

Read 3 floating-point numbers. After, print the roots of bhaskara’s formula. If it's impossible to calculate the roots because a division by zero or a square root of a negative number, presents the message *“Impossivel calcular”*.

Read 3 floating-point numbers (double) A, B and C.

Print the result with 5 digits after the decimal point or the message if it is impossible to calculate.

Input Samples | Output Samples |

10.0 20.1 5.1 |
R1 = -0.29788 |

0.0 20.0 5.0 |
Impossivel calcular |

10.3 203.0 5.0 |
R1 = -0.02466 |

10.0 3.0 5.0 |
Impossivel calcular |