giải các phương trình sau
1) 15.\(\sqrt{x^3-1}\)=4x2+8
2) \(\sqrt{2x-3}\)+6=2x+\(\sqrt{x}\)
3) \(\sqrt{x-\frac{1}{x}}\)+\(\frac{4}{x}\)=x+\(\sqrt{2x-\frac{5}{x}}\)
4)\(\sqrt{5x-1}\)-\(\sqrt{x+2}\)=\(\frac{4x-3}{5}\)
5) \(\sqrt{2x-\frac{3}{x}}\)-1=\(\frac{3}{2x}\)-\(\sqrt{\frac{6}{x}-2x}\)