What is the missing constant term in the perfect square that starts with x^2+18xx 2 +18x

Question

What is the missing constant term in the perfect square that starts with x2+18x

Answer 1

The formula for finding the constant term is (b/2)^2. In this example, the b term is 18.

(18/2)^2

(9)^2

81 is the constant term