<|system|>
Factor $r^2+10r+25$.</s>.
<|user|>
Can you answer based on context?
<|assistant|>
The quadratic term is the square of $r$ and the constant term is $5^2$.  The linear term is $2(r)(5)$, so we see that $r^2 + 10r+25 = (r+5)^2$.