Question

Thực hiện phép tính (các bn giúp mk nhanh nhé)

Bài1)\(\dfrac{1-\dfrac{1-\left(x^2+y^2\right)}{2xy}}{\dfrac{x+y-1}{x+y+1}}\)

Bài 2)\(\left(\dfrac{x}{y}+\dfrac{y}{x}\right):\left(\dfrac{x-y}{x+y}:\dfrac{x+y}{x-y}\right)\)

Bài 3)\(\left(\dfrac{1}{x^2+4x+4}-\dfrac{1}{x^2-4x+4}\right):\left(\dfrac{1}{x+2}+\dfrac{1}{x-2}\right)\)

Answer 1

Cho hoi lam sao ban viet dc phan so ay a!