It doesn\'t work correctly... I tried doing some calculations with it, like 1, 5, -2... so the equation would be: -5 +/- (sqrt)5^2 - 4 (1)(-2) wich gives you two roots: x1 = 5.3723 and x2 = -0.3723... When I did it in your calc, I got: NONREAL and NONREAL

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