For this case we have the following equation: 12x2-5x-2 = 0 Using the resolver we have: x = (- b +/- root (b ^ 2 - 4 * a * c)) / (2 * a) Substituting values we have: x = (- (- 5) +/- root ((- 5) ^ 2 - 4 * 12 * (- 2))) / (2 * 12) Rewriting: x = (5 +/- root (25 +96))) / (2 * 12) x = (5 +/- root (121))) / (2 * 12) x = (5 +/- 11) / (2 * 12) Answer: One root is positive and another is negative.