Question

z/3z-1 - z/3z+1

пожалуйста(9

Answer 1

$\frac{z}{3z - 1} - \frac{z}{3z + 1} = \frac{z(3z - 1) + 2(3z - 1)}{(3z - 1)(3z + 1)} =$
-3z²+z+3z²-z/9z²-1=-6z²/9z²-1