Answer:
(1, 20)
Explanation:
Given the quadratic function: -3x² + 6x + 17, this is the general form of the function ax² + bx + c. So, for the given function: 
a = -3
b = 6
c = 17
The vertex can be found by solving for 'h' and 'k' using the following formulas: 
h = 

k = 
