Answer
$\left( 6a+5\right) ^{2}$
Work Step by Step
$36a^{2}+60a+25=\left( 6a\right) ^{2}+2\times \left( 6a\right) \times \left( 5\right) +5^{2}=\left( 6a+5\right) ^{2}$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.