To factor the given quadratic expression completely, we can look for a pattern or use the quadratic formula. In this case, the expression resembles a perfect square trinomial. We can rewrite it as the square of a binomial.
Solution Approach
Recognize the pattern of a perfect square trinomial.
Rewrite the expression as the square of a binomial.
Step 1: Identify the Expression
We start with the expression:
\[
36y^{2} + 12yz + z^{2}
\]
Step 2: Recognize the Perfect Square Trinomial
This expression can be recognized as a perfect square trinomial, which can be expressed in the form:
\[
(a + b)^{2} = a^{2} + 2ab + b^{2}
\]
In our case, we can identify \(a = 6y\) and \(b = z\).
Step 3: Factor the Expression
Using the identified values of \(a\) and \(b\), we can rewrite the expression as:
\[
(6y + z)^{2}
\]
Final Answer
Thus, the complete factorization of the expression is:
\[
\boxed{(6y + z)^{2}}
\]