lab4b2.c

#include<stdio.h>
#include<math.h>
int main(){   
float a, b, c;
float delta, x1, x2;
    printf("nhap he so a:");
    scanf("%f", &a);
     printf("nhap he so b:");
    scanf("%f", &b);
     printf("nhap he so c:");
    scanf("%f",&c);
    delta = b * b - 4 * a * c;
               
        if (delta > 0) {
        x1 = (-b + sqrt(delta)) / (2 * a);
        x2 = (-b - sqrt(delta)) / (2 * a);
        printf("Phuong trinh co 2 nghiem phan biet:\n");
        printf("x1 = %f\n", x1);
        printf("x2 = %f\n", x2);
    } else if (delta == 0) {
        x1 = -b / (2 * a);
        printf("Phuong trinh co nghiem kep:\n");
        printf("x = %f\n", x1);
    } else {
        printf("Phuong trinh vo nghiem\n");
    }
return 0;
}