Question 431405
a number minus the ^2 of the number = 2/9
.
Let x = the number
then
{{{ x - x^2 = 2/9)
{{{ x  = x^2 + 2/9)
{{{ 0  = x^2 - x + 2/9)
applying the quadratic formula we get:
x = {0.667, 0.333}
.
Details of quadratic solution follows:
*[invoke quadratic "x", 1, -1, 2/9 ]