x(1-x)=0.18

Solution for x(1-x)=0.18 equation:

x(1-x)=0.18

We move all terms to the left:

x(1-x)-(0.18)=0

We add all the numbers together, and all the variables

x(-1x+1)-(0.18)=0

We add all the numbers together, and all the variables

x(-1x+1)-0.18=0

We multiply parentheses

-1x^2+x-0.18=0

a = -1; b = 1; c = -0.18;
Δ = b2-4ac
Δ = 12-4·(-1)·(-0.18)
Δ = 0.28
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{0.28}}{2*-1}=\frac{-1-\sqrt{0.28}}{-2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{0.28}}{2*-1}=\frac{-1+\sqrt{0.28}}{-2}
$