Question

[Đỗ Thị Ngọc Trâm]

\(\dfrac{\left(\sqrt{x}-\sqrt{y}\right)^2-4\sqrt{xy}}{1+\sqrt{xy}}\) với ( x = 2, y = 1)

Answer 1

[Lâm Duy Thành]

C= \(\dfrac{√x-√y}{xy√xy}\) : 

\(\dfrac{(1}{x})\) + \(\dfrac{(1}{y)}\) . \(\dfrac{1}{x+y+2√xy}\)

+ \(\dfrac{2}{(√x+√y)³}\) . \(\dfrac{(1}{√x)}\) + \(\dfrac{(1}{√y)}\) 

Tính C với x = 2 - √3 ; y = 2+√3