Question

Diego is solving the equation x² - 12x = 18.
Which value must be added to both sides of
the equation to make the left side a
perfect-square trinomial?
A. 36
B. 144
C. 12
D. 7

Answer 1

Answer:

36

Step-by-step explanation:

because

${x }^{2} - 12x + 36 \\ = > {(x - 6)}^{2}$