Answer:
D-(36)on ed :)
Explanation:
c = 36
To create a perfect square trinomial.
Add (half the coefficient of the x- term)² to x² - 12x
x² + 2(- 6) + (- 6)²
= x - 12x + 36, thus
x² - 12x + 36
= (x - 6)²
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