Question

Write a program to calculate quadratic equation in c++

Answer 1

#include<iostream>

#include<cmath>

#include<cstdlib>

#include<cstring>

using namespace std;

int main()

{

double a,b,c,x1,x2;

char x;

cout<<"enter the value of a=";

cin>>a;

cout<<"enter the value of b=";

cin>>b;

cout<<"enter the value of c=";

cin>>c;

cout<<"the quadratic equation is"<<a;

cout<<"*x*x+"<<b;

cout<<"*x+"<<c<<endl;

if

(a==0 && b==0)

cout<<"not a valid equation";

if

(a==0 && b!=0)

{

x1=-(c/b);

cout<<endl;

cout<<"root="<<x1;

cout<<endl;

}

if ((b*b-4*a*c)>0)

{

x2=(b*b)-(4*a*c);

x1=-b+sqrt(x2);

cout<<"root="<<x1<<endl;

}

if ((b*b-4*a*c)<0)

{

cout<<"not a real root"<<endl;

}

system("pause");

return 0;

}