Precalculus Examples

$f (x) = \frac{1}{7} x^{2} + \frac{1}{7} x - \frac{2}{7}$

Step 1

Simplify each term.

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Step 1.1

Combine $\frac{1}{7}$ and $x^{2}$ .

$\frac{x^{2}}{7} + \frac{1}{7} x - \frac{2}{7}$

Step 1.2

Combine $\frac{1}{7}$ and $x$ .

$\frac{x^{2}}{7} + \frac{x}{7} - \frac{2}{7}$

Step 2

The Rational Roots Test requires the polynomial to have integer coefficients. Since $\frac{x^{2}}{7} + \frac{x}{7} - \frac{2}{7}$ does not, the Rational Roots Test cannot be used.

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