Answer:
Step-by-step explanation:
Solve the equation for x by finding a, b, and c of the quadratic then applying the quadratic formula.
Exact Form:x=6±√17
Decimal Form:x=10.12310562…,1.87689437…
https://www.mathsisfun.com/adding-decimals.html
This has an explanation.
I would say it represents the volume function evaluated at r=5/7, or
V(5/7)=(4/3)π(5/7)² = 2.13714
