-81x^2+x+936=0

Solution for -81x^2+x+936=0 equation:

-81x^2+x+936=0

a = -81; b = 1; c = +936;
Δ = b2-4ac
Δ = 12-4·(-81)·936
Δ = 303265
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-\sqrt{303265}}{2*-81}=\frac{-1-\sqrt{303265}}{-162}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{303265}}{2*-81}=\frac{-1+\sqrt{303265}}{-162}
$