Question 669022
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
y = -x3 + 5x2 - 11x + 55   ||x = 5 one root  -125 + 125 - 55 + 55 = 0
using Synthetic Divsion
5	-1	5	-11	55
 	 	-5	0	-55
 	-1	0	-11	0
results in:
 -x^2 - 11 = 0
 x^2 + 11 = 0
   x^2 = -11
   x = ± i&#8730;11
roots are:  i&#8730;11,-i&#8730;11,5