equation problem

[oghenekaro EFEKODO]

pls,i tried writing a program for quadratic equation but failed.i did this

public double equation(double a,double b,double c){
double d=Math.pow(b,2)-4*a*c;
if(d>0){
double x1=(-b+Math.sqrt(d))/2*a;
double x2=(-b-Math.sqrt(d))/2*a;
}
return;
}
couldn't attempt d==0 and d<0.
it was giving an error message.so what do i do and do solve others.thanks

[Martin Simons]

What error message. Also you declare to return a double but actually
return nothing. Was this your error message, maybe?

[Vladimir Nesov]

Also note that 10/2*5 is 25, not 1. You wrote wrong in your formulae.