Question

Помогите очн нужно 4 5 пример номер 411

Answer 1

4.)

$frac{x - y}{x} - frac{5y}{ {x}^{2} } times frac{x {}^{2} - xy } {5y} = frac{x - y}{x} - frac{5y times x(x - y)}{x {}^{2} times 5y}$

$frac{x - y}{x} - frac{x - y}{x} = 0$

5.)

$( frac{x}{x + 1} + 1) times frac{1 + x}{2x - 1} = ( frac{x}{x + 1} + frac{1}{1} ) times frac{1 + x}{2x - 1} = ( frac{x + x + 1}{x + 1} ) times frac{1 + x}{2x - 1} = frac{2x + 1}{x + 1} times frac{1 + x}{2x - 1} = frac{(2x + 1)(1 + x)}{(x +1)(2x - 1) } = frac{2x + 1}{2x - 1}$