Answer
$(3.2,23.1), (-1.5,12) \text{ and } (2.7,12)$
Work Step by Step
Using a graphing calculator, the graph of $
y=5x^2-6.2x-8.3
$ is given below. Based on the graph, rounded to one decimal place, the desired points are $
(3.2,23.1), (-1.5,12) \text{ and } (2.7,12)
.$