PROGRAMMING:find the root of the quadratic equation

This topic requires the root of the quadratic equation of one variable $$ax ^ 2 + BX + C = 0 $$, and the result retains 2 decimal places.
###Input format:
The input gives three floating-point coefficients a, B and C in one line, separated by spaces.
###Output format:
According to the coefficient, different results are output
1) If the equation has two unequal real roots, each line outputs one root, which is larger first and smaller later;
2) If the equation has two unequal complex roots, each line outputs a root according to the format of "real part + imaginary part I". The imaginary part is positive first, and then negative;
3) If the equation has only one root, the root is directly output;
4) If the coefficients are all 0, "zero equation" is output;
5) If a and B are 0 and C is not 0, "not an equation" is output.
###Input sample 1:
```in
2.1 8.9 3.5
```
###Output sample 1:
```out
-0.44
-3.80
```
###Input sample 2:
```
1 2 3
```
###Output sample 2:
```
-1.00+1.41i
-1.00-1.41i
```
###Input sample 3:
```
0 2 4
```
###Output sample 3:
```
-2.00
```
###Input sample 4:
```
0 0 0
```
###Output sample 4:
```
Zero Equation
```
###Input sample 5:
```
0 0 1
```
###Output sample 5:
```
Not An Equation
```






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