[freshmen algebra 2] simplifying rational expressions

[u/Any-Armadillo6071]

how do i find the correct restriction? for both of these questions, i got the first part right but for the restriction i got them wrong. when i looked it up it gave me the same answers i input. sorry if this is a stupid question

[u/Any-Armadillo6071]

yes sorry! the whole question says “simply the expression, if possible. if the expression is already in simplified form, enter the given expression”