Answer:
Step-by-step explanation:
Here's a concise version of the solution:
1. We find the parabola's equation to be y = (1/4)x² - x + 3/4 through the given points and vertex.
2. The slope of the tangent line passing through Q(0, 6) is -1.
3. Using the point-slope form, the tangent line's equation is y = -x + 6.
4. To find the tangency points, solve the system formed by y = (1/4)x² - x + 3/4 and y = -x + 6 (two x-value solutions exist).
5. Substitute the x-values back into the parabola's equation to get the corresponding y-coordinates for the two points of tangency.