rút gọn \(\dfrac{3}{\sqrt{x}+5}+\dfrac{20-2\sqrt{x}}{x-25}\)

\(\dfrac{3}{\sqrt{x}+5}+\dfrac{20-2\sqrt{x}}{x-25}\) .va \(\dfrac{\sqrt{x}+2}{\sqrt{x}+5}\)

tinhs a khi x=9

cho P = \(\dfrac{3.b}{a}\) tim  nguyen de p laf 1 so nguyen

rut gon \(\dfrac{3}{\sqrt{x}+5}+\dfrac{20-2\sqrt{x}}{x-25}\)

\(x-\sqrt{x+1}=\dfrac{-5}{4}\)

\(\sqrt{2x-1}+\dfrac{3}{2}\sqrt{8x-4}-\dfrac{2}{5}\sqrt{50x-25}-4=0\)

\(\dfrac{\sqrt{x}+2}{\sqrt{x}+3}b=\dfrac{3}{\sqrt{x}+5}+\dfrac{20-2\sqrt{x}}{x-25}\)

a.ruts gon B

b.cho p=\(\dfrac{3.A}{B}\) tìm x nguyên P có giá trị là 1soos nguyên

\(\sqrt{x^2-10x+25}=6\)

\(A=\dfrac{\sqrt{x}+2}{\sqrt{x}+5}.B=\dfrac{3}{\sqrt{x}+5}+\dfrac{20-2\sqrt{x}}{x-25}\) 

a tinhs a khi x = 9

b rút gon B=\(\dfrac{1}{\sqrt{x}-5}\)

c.cho P=\(\dfrac{3.B}{A}\) tìm x nguyên để P là 1 giá trị nguyên 

\((\sqrt{7}-\sqrt{3})^2+\sqrt{84}\)