Use the Rational Roots Test to Find All Possible Roots f(x)=9x^4-x^3+5x^2-2x-39

$f (x) = 9 x^{4} - x^{3} + 5 x^{2} - 2 x - 39$

Step 1

If a polynomial function has integer coefficients, then every rational zero will have the form $\frac{p}{q}$ where $p$ is a factor of the constant and $q$ is a factor of the leading coefficient.

$p = \pm 1, \pm 3, \pm 13, \pm 39$

$q = \pm 1, \pm 3, \pm 9$

Step 2

Find every combination of $\pm \frac{p}{q}$ . These are the possible roots of the polynomial function.

$\pm 1, \pm \frac{1}{3}, \pm \frac{1}{9}, \pm 3, \pm 13, \pm \frac{13}{3}, \pm \frac{13}{9}, \pm 39$

Use the Rational Roots Test to Find All Possible Roots f(x)=9x^4-x^3+5x^2-2x-39

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