3. From segments with lengths $12a$, $12a+25$, and $a^2$, a triangle can be formed. Find all possible values of $a$.

翻译完成，保留了原文的换行和格式。
Write the answer in the form of an interval (square brackets mean that the boundary is included in the solution set of the inequality, round brackets mean that it is not included).

Answer: $(2 ; 25)$

## Examples of how to write the answer:

$[-4 ; 5)$

$(-4 ; 5]$

$(-4 ; 5)$

$[-4 ; 5]$

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