0.09=x-(x^2)

Solution for 0.09=x-(x^2) equation:

0.09=x-(x^2)

We move all terms to the left:

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

We get rid of parentheses

x^2-x+0.09=0

We add all the numbers together, and all the variables

x^2-1x+0.09=0

a = 1; b = -1; c = +0.09;
Δ = b2-4ac
Δ = -12-4·1·0.09
Δ = 0.64
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{0.64}}{2*1}=\frac{1-\sqrt{0.64}}{2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1)+\sqrt{0.64}}{2*1}=\frac{1+\sqrt{0.64}}{2}
$