Answer:
The answer to your question is 81
Step-by-step explanation:
Data
p² + 18p + c
In a perfect square trinomial the third term is to the second power and is the result of multiplying the coefficient of the first term by two by the square root of the third term, then,
square root of p² = 1p
second term divided by two 18p/ 2 = 9p
then, the third term must be 9p/1p = (9)² = 81
