1.  Tính : \(\dfrac{12}{4-\sqrt{10}}\)-6\(\sqrt{\dfrac{5}{2}}\)+\(\dfrac{5\sqrt{2}+\sqrt{10}}{\sqrt{5}+1}\)
2,Rút gọn:A=(\(\dfrac{\sqrt{x}}{\sqrt{x}-5}\)-\(\dfrac{5}{\sqrt{x}+5}\)+\(\dfrac{10\sqrt{x}}{25-x}\)):\(\dfrac{3}{\sqrt{x}+5}\)

1,Tính \(\dfrac{12}{4-\sqrt{10}}-6\sqrt{\dfrac{5}{2}}+\dfrac{5\sqrt{2}+\sqrt{10}}{\sqrt{5}+1}\)
2,Rút gọn:A=\(\left(\dfrac{\sqrt{x}}{\sqrt{x}-5}-\dfrac{5}{\sqrt{x}+5}+\dfrac{10\sqrt{x}}{25-x}\right):\dfrac{3}{\sqrt{x}+5}\)

Rút gọn

\(\dfrac{\sqrt{x}}{\sqrt[]{x}-5}+\dfrac{10\sqrt{x}}{x-25}-\dfrac{5}{\sqrt{x}+5}\)

Rút gọn: \(\dfrac{x-10\sqrt{x}+25}{\left(\sqrt{x}-5\right)\left(\sqrt{x}+5\right)}\)

Rút gọn : \(\frac{\sqrt{x}}{\sqrt{x}+5}+\frac{10\sqrt{x}}{25-x}-\frac{5}{\sqrt{x}+5}\)

Rút gọn các biểu thức sau:

a, \(5\sqrt{x}-{(x+10\sqrt{x}+25)(\sqrt{x}-5)\over x-25}\) với 0 ≤ x ≠ 25

b, \({\sqrt{x^2-4x+4}\over x-2}\) với x ≠ 2

Rút gọn A=\(\left(\frac{5\sqrt{x}+50}{x+5\sqrt{x}}+\frac{2\sqrt{x}-10}{\sqrt{x}}+\frac{x}{5\sqrt{x}+25}\right).\frac{7}{15+3\sqrt{x}}\)

giải phương trình:

1,\(\sqrt{3x-8}\)-\(\sqrt{x+1}\)=\(\dfrac{2x-11}{5}\)

2,3x²-3x+18=10\(\sqrt{x^3+8}\)

3,\(\sqrt{5+2x}\)+\(\sqrt{5-2x}\)+5=3\(\sqrt{25-4x^2}\)

A=\(\frac{\sqrt{x}}{\sqrt{x}-1}-\frac{10\sqrt{x}}{x-25}-\frac{5}{\sqrt{x}+5}\)

Tìm đkxd và rút gọn