Question

What are the possible rational zeros of f(x) = 3x^4 + x^3 – 13x^2 – 2x + 9?

± 1, ± 3

± 1, ± 3, ± 9

± 1, ± , ± , ± 3

± 1, ± , ± 3, ± 9

i got d am I right

Answer 1

if f(x)= ax^4 + bx^3 + cx^3 +dx + e
then possible rational zeros of f(x) according to ration root theorem are :
±(factors of e)/(factors of a)
[note e is not exponent but any constatnt]
all permutations and combinations of factors can be a root.
try now..

Answer 2

rational root theorem **

Answer 3

for d i forgot to put the 1/3

Answer 4

\( 3x^4 + x^3 – 13x^2 – 2x + 9 \)

Using the rational root theorem ( http://en.wikipedia.org/wiki/Rational_root_theorem )
\(\pm\) Factors of 9 / Factors of 3

In this case, \[ \pm \frac {1,3,9}{1,3} \]

Answer 5

okay so my answer was right ± 1, ± 1/3, ± 3, ± 9

Answer 6

thanks guys

Answer 7

Yes that's right :)