Answer:
[tex] \dfrac{z^2}{25} [/tex]
Step-by-step explanation:
[tex] \left( \dfrac{z}{5} \right)^2 = [/tex]
[tex] = \dfrac{z^2}{5^2} [/tex]
[tex] = \dfrac{z^2}{25} [/tex]
[tex]Use\ \left(\dfrac{a}{b}\right)^n=\dfrac{a^n}{b^n}\\\\\left(\dfrac{z}{5}\right)^2=\dfrac{z^2}{5^2}=\dfrac{z^2}{25}[/tex]
