Question

WAP in C++ to find the roots of a quadratic equations.​

Answer 1

Answer:

#include <iostream>

#include <cmath>

using namespace std;

int main() {

   float a, b, c, x1, x2, discriminant, realPart, imaginaryPart;

   cout << "Enter coefficients a, b and c: ";

   cin >> a >> b >> c;

   discriminant = b*b - 4*a*c;

   

   if (discriminant > 0) {

       x1 = (-b + sqrt(discriminant)) / (2*a);

       x2 = (-b - sqrt(discriminant)) / (2*a);

       cout << "Roots are real and different." << endl;

       cout << "x1 = " << x1 << endl;

       cout << "x2 = " << x2 << endl;

   }

   

   else if (discriminant == 0) {

       cout << "Roots are real and same." << endl;

       x1 = -b/(2*a);

       cout << "x1 = x2 =" << x1 << endl;

   }

   else {

       realPart = -b/(2*a);

       imaginaryPart =sqrt(-discriminant)/(2*a);

       cout << "Roots are complex and different."  << endl;

       cout << "x1 = " << realPart << "+" << imaginaryPart << "i" << endl;

       cout << "x2 = " << realPart << "-" << imaginaryPart << "i" << endl;

   }

   return 0;

}

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