Question

виконайте додавання
у/х²-у²+1/х+у​

Answer 1

$\frac{y}{x^2-y^2}+\frac{1}{x+y}=\frac{y}{(x-y)(x+y)}+\frac{1}{x+y}=\frac{y+(x-y)}{(x-y)(x+y)}=\frac{y+x-y}{x^2-y^2}=\frac{x}{x^2-y^2}$