Question 246539
x2 +2/3 x =0
*[invoke quadratic "x", 1,2/3, 0]
complete the square by taking 1/2 (2/3) and squaring it.
(1/3)^2=1/9
add 1/9 to both sides

x2 +2/3 x +1/9=1/9
factor
(x+1/3)^2=1/9
get sqrt
|x+1/3|=1/3
ans one
x+1/3=-1/3
x=-2/3
answer two
x+1/3=1/3
x=0