For the first one, since x=5, we would substitute 5 for x in the expression:
[tex] {x}^{2} [/tex]
So, it would be 5^2, which means 5 multiplied by itself 2 times, so it would be 5×5 which is 25.
For the next one, it's asking:
[tex] {1}^{x} [/tex]
So if we substitute 5 for x, we get:
[tex] {1}^{5} [/tex]
Which means 1 multiplied by itself 5 times, so it would be 1×1×1×1×1 which equals 1.
Finally, we have:
[tex] {x}^{1} [/tex]
So again we substitute 5 for x to get
[tex] {5}^{1} [/tex]
Which means 5 multiplied by itself one time which is just 5.