If your calculator does not have those, use the "quadratic formula":
The solutions to $\displaystyle ax^2+ bx+ c= 0$ are given by
$\displaystyle x= \frac{-b\pm\sqrt{b^2- 4ac}}{2a}$.
If your calculator does not have those, use the "quadratic formula":
The solutions to $\displaystyle ax^2+ bx+ c= 0$ are given by
$\displaystyle x= \frac{-b\pm\sqrt{b^2- 4ac}}{2a}$.
I had no idea that I could plug that weird-looking equation into the quadratic formula. How about that?