Question

Given the polynomial f(x)=8x5−4x3 6x 15

what one of the following is a possible rational root?

a. 5 / 6
b. 4 / 14
c. 7 / 5
d. 5 / 4

Answer 1

Hello,

Answer D 5/4


since div 15={1,3,5,15}
and div 8={1,2,4,8}
posiible rational root is a*b where a∈div 15 and b∈div 8