solving quadratic equations
8s^3=72s
Rewrite that as
8s(s^2 - 9) = 8s(s+3)(s-3) = 0
The solutions occur when any of the factors is zero. That would be at
s = 0, s = 3 or s = -3.
8s^3=72s
8s(s^2 - 9) = 8s(s+3)(s-3) = 0
The solutions occur when any of the factors is zero. That would be at
s = 0, s = 3 or s = -3.