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Sunday, June 28, 2015

Solve Quadratic Equation

 Sumit Kar     June 28, 2015     If Else, Math     No comments   

#include <stdio.h>
#include <math.h>
void main()
{
float a,b,c,d,temp,r1,r2;
printf("\nEnter the value of a\t:");
scanf("%f",&a);
printf("Enter the value of b\t:");
scanf("%f",&b);
printf("Enter the value of c\t:");
scanf("%f",&c);

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

if(d==0)
{
printf("\nRoots are real and equal\n");
r1=-b/(2*a);
printf("\t X1=%f \n \t X2=%f ", r1, r1 );
}

else if(d>0)
{
printf("\nRoots are real and distinct\n");
temp=sqrt(d);

r1=(-b+temp)/(2*a);
r2=(-b-temp)/(2*a);

printf("\n\tX1=%f\n\tX2=%f",r1,r2);
}

else
{
printf("\nRoots are Imaginary\n");
d*=-1;
temp=sqrt(d);
r1=-b/(2*a);
r2=temp/(2*a);
printf("\n\tX1=(%f + %fi)\n\tX2=(%f - %fi)",r1,r2,r1,r2);
}
}
  
Output
Enter the value of a :1
Enter the value of b :-11
Enter the value of c :30

Roots are real and distinct

X1=6.000000
X2=5.000000
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