Question

Выполните сложение: x+4/xy-x^2 + y+4/xy-y^2

Answer 1

$frac{x + 4}{xy - x {}^{2} } + frac{y + 4}{xy - y {}^{2} } \ \ frac{x + 4}{x times (y - x)} + frac{y + 4}{y times (x - y)} \ \ frac{x + 4}{x times ( - (x - y))} + frac{y + 4}{y times (x - y)} \ \ - frac{x + 4}{x times (x - y)} + frac{y + 4}{y times (x - y)} \ \ frac{ - y times (x + 4) + x times (y + 4)}{xy times (x - y)} \ \ frac{ - xy - 4y + xy + 4x}{xy times (x - y)} \ \ frac{4( - y + x)}{xy times (x - y)} \ \ frac{4}{xy.}$