Solve $x^{2} - 4 x + 9 = 0$ for $x$ (real roots)

The calculator will try to solve the equation $x^{2} - 4 x + 9 = 0$ for $x$ (find the real roots) on the interval $\left(-\infty, \infty\right)$.

Equation:

Solve for:

Leave empty for autodetection.

Interval:

Optional.

Only real roots?

If the interval is specified, the checkbox will be checked automatically.

If the calculator did not compute something or you have identified an error, or you have a suggestion/feedback, please contact us.