Question 468362
Use the Rational Zero Theorem to list all possible rational zeros for the given function. 
x^5- 6x^2 + 3x+ 21
...
a0=21:±1, ±3, ±7, ±21
a5=1: ±1
Possible rational zeros, (a0/a5): ±1, ±3, ±7, ±21