Question

d^2 + 18d + 81

Answer 1

[AI-generated answer — Bot GPT 3.5]

This is a quadratic trinomial that can be factored as:

d^2 + 18d + 81 = (d + 9)(d + 9) = (d + 9)^2

So, d^2 + 18d + 81 can be written as (d + 9)^2.