Question

Use C++, visual studio format. Please

Write a program to solve the quadratic equation and find only the real and equal roots. the program should test for three types of roots tell the users the roots type and then calculate the real roots. the user enters the values of a ,b and c. you calculate r1 and r2. c

Answer 1

#include <iostream>
#include <cmath>

using namespace std;

int main() {
    double a, b, c, d, r1, r2;
    cout << "Enter a: ";
    cin >> a;
    cout << "Enter b: ";
    cin >> b;
    cout << "Enter c: ";
    cin >> c;
    d = b*b - 4*a*c;    // find discriminant.
    if(d < 0) {
        // if discriminant is negative
        cout << "No real solution to the equation" << endl;  // print that there are two imaginary roots
    } else {
        // else if the discriminant is non-negative
        // calculate the roots
        d = pow(d, 0.5);
        r1 = (-b + d) /  (2*a);
        r2 = (-b - d) / (2*a);
        if(r1 == r2) {
            cout << "Equation has equal roots with root of " << r1 << endl;
        } else {
            cout << "The roots are " << r1 << " and " << r2 << endl; // print both the roots
        }
    }
    return 0;
}