4. In algebra, the values x, or roots, of an (quadratic) equation of the form ax² + bx + c = 0, where a, b and care real numbers, are calculated using the quadratic formula, namely x = (-b ± (b²-4ac))/2a. If the discriminant of this formula, namely b²-4ac, is zero, then there is 1 root. If the discriminant is positive, then there are 2 roots. If the discriminant is negative, then there are 2 complex or imaginary roots. Using C++ code, write a program to print "1 root", "2 roots" or "2 complex roots" if the discriminant is zero, positive or negative, respectively, where a, b and care input by a user via the keyboard.

// Online C++ compiler to run C++ program online #include #include using namespace std; int main() { // Write C++ code here float a, b, c, r1, r2, d, realPart, imaginaryPart; cout > a >> b >> c; d = b*b - 4*a*c; if (d > 0) { r1 = (-b + sqrt(d)) / (2*a); r2 = (-b - sqrt(d)) / (2*a); cout << "Roots are real and different." << endl; cout << "root1 = " << r1 << endl; cout << "root2 = " << r2 << endl; } else if (d == 0) { cout << "Roots are real and same." << endl; r1 = -b/(2*a); cout << "r1 = r2 =" << r1 << endl; } else { realPart = -b/(2*a); imaginaryPart =sqrt(-d)/(2*a); cout << "Roots are complex." << endl; cout << "root1 = " << realPart << "+" << imaginaryPart << "i" << endl; cout << "root2 = " << realPart << "-" << imaginaryPart << "i" << endl; } return 0; }

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4. In algebra, the values x, or roots, of an (quadratic) equation of the form ax² + bx + c = 0, where a, b and care real numbers, are calculated using the quadratic formula, namely x = (-b ± (b²-4ac))/2a. If the discriminant of this formula, namely b²-4ac, is zero, then there is 1 root. If the discriminant is positive,