Javascript 一元二次方程

<script language=”Javascript”>

function q(a,b,c) {

var ans1 = (-b+Math.sqrt(b*b-4*a*c))/(2*a);

var ans2 = (-b-Math.sqrt(b*b-4*a*c))/(2*a);

window.alert(ans1+”,”+ans2);

}

q(2,3,1);

</script>