x-2x^2=-50

Solution for x-2x^2=-50 equation:

x-2x^2=-50

We move all terms to the left:

x-2x^2-(-50)=0

We add all the numbers together, and all the variables

-2x^2+x+50=0

a = -2; b = 1; c = +50;
Δ = b2-4ac
Δ = 12-4·(-2)·50
Δ = 401
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{401}}{2*-2}=\frac{-1-\sqrt{401}}{-4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{401}}{2*-2}=\frac{-1+\sqrt{401}}{-4}
$