public void QuadraticEquationExTest()
{
//equation 2x^2+3x-1
var result = EquationSolver.QuadraticEquationEx(2, 3, -1);
Assert.IsTrue(result[0].ApproximatelyEquals(-1.78077640640442, 1e1 - 0));
Assert.IsTrue(result[1].ApproximatelyEquals(0.280776406404415, 1e-10));
}
