Algebra

Let's combine all like terms first. We have

$x^2+18x+3$

We can't factor this equation yet, so let's complete the square. We get

$x^2+18x+81+3-81\\ (x+9)^2-78$

Thus, the first blank is 1, the second blank is 9, and the third blank is -78. 

Thanks! :)