+36916 b^3 - 4b^2 - 21b = 0 Factor out 'b'
b (b^2-4b-21) = 0 factor
b (b-7)(b+3) = 0
for this to = 0 either ( b = 0) or b-7 = 0 (b=7) or b+3 = 0 (b=-3)
+36916 b^3 - 4b^2 - 21b = 0 Factor out 'b'
b (b^2-4b-21) = 0 factor
b (b-7)(b+3) = 0
for this to = 0 either ( b = 0) or b-7 = 0 (b=7) or b+3 = 0 (b=-3)
