Solution:
The expression is given below as
[tex](x+5)(x-5)[/tex]The above expression as difference of two squares will be given below as
[tex]\begin{gathered} (x+5)(x-5)=(x^2-5^2)=x^2-25 \\ \text{note:} \\ (a-b)(a+b)=a^2-b^2 \end{gathered}[/tex]By expansion, we will have
[tex]\begin{gathered} (x+5)(x-5) \\ x(x-5)+5(x-5) \\ x^2-5x+5x-25 \\ x^2-25 \end{gathered}[/tex]Hence,
The final answer is
[tex]x^2-25[/tex]