Ta có:[tex]x^2=(\sqrt{\frac{3}{5}}+\sqrt{\frac{5}{3}})^2=\frac{3}{5}+\frac{5}{3}+2.\sqrt{\frac{3}{5}}.\sqrt{\frac{5}{2}}=2+\frac{34}{15}=\frac{64}{15}[/tex]
[tex]\sqrt{15}x=\sqrt{3}.\sqrt{5}(\sqrt{\frac{3}{5}}+\sqrt{\frac{5}{3}})=3+5=8\Rightarrow B=64-8-2=54[/tex]
Ta có: [tex]\sqrt{15}.x=\sqrt{15}.(\frac{\sqrt{3}}{\sqrt{5}}+\frac{\sqrt{5}}{\sqrt{3}})=3+5=8[/tex]
Ta có:
Pt <=> [tex](\sqrt{15}.x)^2-\sqrt{15}x-2=8^2-8-2=74[/tex]
Ta có: [tex]\sqrt{15}.x=\sqrt{15}.(\frac{\sqrt{3}}{\sqrt{5}}+\frac{\sqrt{5}}{\sqrt{3}})=3+5=8[/tex]
Ta có:
Pt <=> [tex](\sqrt{15}.x)^2-\sqrt{15}x-2=8^2-8-2=74[/tex]