determinant:
(a)
D<0 means there are no real roots. there are two complex roots with imaginary components.
(b) D=16+20=36>0
D>0 means there are two real roots
(c) D = 20^2-4*4*25 = 0
D=0 means there is one real root with multiplicity 2
Using the cube formula for volume I got V=3.38cm^3
Do you need it explained or just the answer
The answer is 3
because 18/27 = 2/3