Algebra

First let's combine all like terms and simplify. We have'

$x^{2}+18x+3$

Now, we complete the square for x. Since it is 18x, we add and subtract 81 from the equation. We have

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

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

Thanks! :)