003_cuadratica.c

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#include <stdio.h>
#include <math.h>
 
int main(int argc, char *argv[])
{
    float a, b, c, x1r, x1i, x2r, x2i, r;
    printf("Ingrese el cuadratico: ");
    scanf("%f", &a);
    printf("Ingrese el lineal: ");
    scanf("%f", &b);
    printf("Ingrese el independiente: ");
    scanf("%f", &c);
    r = b*b-4*a*c;
    x1r = (-b+(r>=0?sqrt(r):0))/(2*a);
    x1i = r>=0?0:sqrt(-r)/(2*a);
    x2r = (-b+(r>=0?-sqrt(r):0))/(2*a);
    x2i = r>=0?0:-sqrt(-r)/(2*a);
    printf("X1 = %f%+fi\n", x1r, x1i);
    printf("X2 = %f%+fi\n", x2r, x2i);
    return 0;
}