Question

Use the Rational Root Theorem to list all possible rational roots for each
equation. Then find any actual rational root.

(problem in comments)

Answer 1

\[x^3+5^2-2x-15=0\]

Answer 2

\[\huge\frac{\pm 1,3,5,15}{\pm 1}\]

Answer 3

yeaup! I got all those, but I can't find the actual rational roots :/

Answer 4

8 possible values, try them all

Answer 5

maybe there are no rational roots

Answer 6

Agh, I have. Maybe I'm doing something wrong.

Answer 7

Ah, okay. No solution then?

Answer 8

the rational root test doesn't guarantee rational roots

Answer 9

Is it possible to use the quadritic formula for this equation?

Answer 10

is that x^3+5x^2 or x^3+5^2

Answer 11

no, you can't use the quadratic formula here

Answer 12

5x^2

Answer 13

okay, thank you!