#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
 
int main() {
    double a = 1, b = -2, c = 10;
    double discriminant = b * b - 4 * a * c;
 
    double realPart = -b / (2 * a);
    double imaginaryPart = sqrt(abs(discriminant)) / (2 * a);
 
    cout << fixed << setprecision(4);
    cout << realPart << " + " << imaginaryPart << "i" << endl;
    cout << realPart << " - " << imaginaryPart << "i" << endl;
 
    return 0;
}

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