an eqn of the form ax²+bx+c=0 known as quadratic equation . the values of x that satisfy the eqn are known as roots of the eqn

Answer 1

#include <iostream>
#include <cmath>

using namespace std;

int main() {

double a ,b ,c;
double x1, x2;
double det;

cout<<"please enter a, b and c"<<endl;
cin>>a>>b>>c;
det=b*b-4*a*c;

if(det>0)
{
x1=(-b+sqrt(det))/(2*a);
x2=(-b-sqrt(det))/(2*a); cout<<"x1 = "<<x1<<endl;
cout<<"x2 = "<<x2<<endl;
}
else if(det==0)
{
x1=(-b+sqrt(det))/(2*a);
cout<<"x1 = x2 = "<<x1;
}
return 0;
}

Answer 2

In the header, include <cmath>,
then you can use sqrt() function to get quareroot of a number. Like so: sqrt(4) returns 2.
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