Answer:
[tex] p = - \frac{1}{2}, \: \: p = \frac{1}{2} [/tex]
Step-by-step explanation:
[tex] {p}^{2} = \frac{9}{36} \\ \\ {p}^{2} = \frac{1}{4} \\ \\ p = \pm \sqrt{ \frac{1}{4} } \\ \\ p = \pm \frac{1}{2} \\ \\ p = - \frac{1}{2}, \: \: p = \frac{1}{2} [/tex]
