Question

2/3m-4
z/4(x-9)-2z/y-x
3/x²-2x+1/2xy-4y
/-дробная черта
Умоляю

Answer 1

$1) \frac{2-12m}{3m}\\\\ 2) \frac{9z}{4(x-y)} \\\\3) \frac{6y+x}{2yx(x-2)}$

Объяснение:

$1) \frac{2}{3m} - 4 = \frac{2}{3m} - \frac{4*3m}{3m} = \frac{2-12m}{3m}\\\\2)\frac{z}{4(x-y)} - \frac{2z}{y- x}=\frac{z}{4(x-y)} - \frac{2z}{-(x-y)} = 2)\frac{z}{4(x-y)} - \frac{2z}{y- x}=\frac{z}{4(x-y)} + \frac{2z}{x-y} = \\\\= \frac{z}{4(x-y)} + \frac{8z}{4(x-y)} = \frac{z+8z}{4(x-y)} = \frac{9z}{4(x-y)} \\\\3) \frac{3}{x^2-2x} + \frac{1}{2xy-4y} = \frac{3}{x(x-2)} + \frac{1}{2y(x-2)} = \frac{3*2y}{2yx(x-2)} + \frac{1*x}{2yx(x-2)}=\frac{6y+x}{2yx(x-2)}$