# POLQ 3| Lesson 2| Practice (Rational Roots)

1).  Factors of 6 are ( leading coefficient and constant) : $$\pm {1}, \pm {2}, \pm {3}, \pm {6}$$

So all the possible roots $$\pm {1}, \pm{\frac{1}{2}}, \pm{\frac{1}{3}}, \pm{\frac{1}{6}}, \pm{\frac{2}{3}}, \pm {3}, \pm{6}$$

2).  Factors of 9 are:  $$\pm {1}, \pm{3}, \pm{9}$$

Factors of 4 are: $$\pm { 1}, \pm {2}, \pm {4}$$

So the possible roots are:  $$\pm{1}, \pm{\frac{1}{2}}, \pm{\frac{1}{4}}, \pm{\frac{3}{2}}, \pm{\frac{3}{4}},\pm{9}\,\pm{\frac{9}{2}}, \pm{\frac{9}{4}}$$

3.  Factors of 4 are: $$\pm { 1}, \pm {2}, \pm {4}$$

Factors of 6 are:  $$\pm {1}, \pm {2}, \pm {3}, \pm {6}$$

So the possible roots are $$\pm { 1}, \pm {2}, \pm {4}, \pm{\frac{1}{2}}, \pm{\frac{1}{3}}, \pm{\frac{1}{6}},\pm{\frac{2}{3}},\pm{\frac{4}{3}}$$

4.  Find the roots for problem 1

Try 3 as a root and it works as shown below because it has a remainder of 0. Factoring the quadratic:  $$6x^2 -7x + 2 = (2x – 1)(3x – 2)$$

Therefore the roots of the equation are:  $$3$$,$$\frac{1}{2}$$ and $$\frac{2}{3}$$