How do I show kids how to find all the  zeros for polynomials  degree 4 and bigger.
 For examples:
 r(x) = x5-11x3-7x2+77 = (x2-11)(x3-7) and s(x) = x4-121 = (x2-11)(x2+11) 
   Also am I correct when I say that the following are irreducible? 
   f(x) = x2-11
 g(x) = x3-7
 h(x) = x4-5