30 points Answer at least some of them please thank you
Answer:
4. [tex]\sqrt{8x^{7} }[/tex]
5. 3x[tex]\sqrt{x}[/tex] [tex]y^{9}[/tex]
6. [tex]\frac{{3} \sqrt{11} }{11}[/tex]
7. [tex]\frac{x^{6} }{49}[/tex]
8. [tex]\sqrt{x} -2\sqrt{3}[/tex]
9. [tex]3\sqrt{3}[/tex]