Answer:
-3,-4
Step-by-step explanation:
(-3,-4)
The vertex is the minimum or maximum or a parabola.
This is an upward opening parabola, so it has a minimum.
The minimum is (-3,-4)
There is no x the equation so there is really no answer for x
24= 31.4x+(-8.4)
or
24= 31.4x-8.4
240