bună ziua! mă poate ajuta cineva la acest exercițiu?

a)
[tex]\it x=8^{2n}\cdot225^n\cdot225+15^{2n}\cdot64^n\cdot64=8^{2n}\cdot15^{2n}\cdot225+15^{2n}\cdot8^{2n} \cdot64\\ \\= (8\cdot15)^{2n}(225+64)=120^{2n}\cdot289=120^{2n}\cdot17^2[/tex]
b)
[tex]\it\sqrt x= \sqrt{120^{2n}\cdor17^n}=\sqrt{(120^n\cdot17)^2}=\underbrace{120^n}_{nr. \ par}\cdot17=nr.\ par[/tex]