Answer:
vertex is (2 , -21)
x = -2 +√10
y = (x-3)²+1
Step-by-step explanation:
x² - 4x - 17
(x² - 4x + 4) - 4 - 17
(x-2)² - 21
2x² +8x = 12
x² + 4x = 6
(x² +4x + 4) - 6 - 4
(x+2)² - 10
x+2 = √10
