Question

Which of the following is a possible rational zero for the polynomial 2x^3 + 7x^2 - 5x + 5?
i know it isnt A
B. 0
C. 1/5
D. 1/2

Answer 1

use rational roots test

Answer 2

use the remainder theorem find

P(0), P(1/5) and P(1/2) when every you get zero as an answer you have a zero of the polynomial.

Answer 3

as an example

P(0) = 5 so 0 isn't a zero of the polynomial

so thats choice gone.

Answer 4

so its C! (:

Answer 5

did you get

P(1/5) = 0 ..?