Question

select the correct answer.
the equation can be solved by completing the square. what number should go in the blanks for the first step?
$x^2 - 18x + \underline{\quad} = 4 + \underline{\quad}$
a. 324
b. 81
c. 9
d. 18

Explanation:

Step1: Identify coefficient of x

The coefficient of \(x\) is -18.

Step2: Calculate half the coefficient

\(\frac{-18}{2} = -9\)

Step3: Square the result

\((-9)^2 = 81\)

Answer:

B. 81