-x(1/3-x)=(x-1)(x+1)

Question

-x(1/3-x)=(x-1)(x+1)

Answer 1

-x(1/3 - x) = x² - 1
-x/3 + x² - x² = -1
 -x/3 = -1
x = 3                   

Answer 2

-1/3х+x^2=x^2-1
x^2-x^2-1/3х+1=0
-1/3х+1=0
-1/3х=-1
х=(-1):(-1/3)
х=3