/*26*/ subBuilder.createVertex(new OpRes());
/*27*/ subBuilder.appendEdge(b2, SetX.INSTANCE);
/*28*/ subBuilder.appendEdge(_4ac, SetY.INSTANCE);
delta = subBuilder.getVertex();
/*31*/ reducer.reduceGraph(delta);
return delta.getContent().result;
}
Collection<Double> roots(double a, double b, double c)