Confused? A quadratic equation looks like the image below. You just need to enter the variables present.
If your equation doesn't look like this, then simplify it first.
\[ ax^2 + bx + c = 0 \]
If you get 'NaN' as a result, that means the solution is complex, like: \[ -\frac{2}{3} \pm \frac{5\sqrt{2}}{3}i \]
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