Answer:
(x - 2)² = 0
Step-by-step explanation:
given x² - 4x + 9 = 5 ( subtract 5 from both sides )
x² - 4x + 4 = 0
This is a perfect square of the form
(x - a)² = x² - 2a + a²
compare coefficients of the x-term
- 2a = - 4 ⇒ a = 2
⇒ (x - 2)² = 0 ← is the required form
