Answer:
[tex]\boxed{c = \sqrt{39} / c= - \sqrt{39} }[/tex]
This " / " means or, btw!
Step-by-step explanation:
[tex]c^2 = 39[/tex]
⇒Take square root.
[tex]c =[/tex] ± [tex]\sqrt{39}[/tex]
[tex]c = \sqrt{39}[/tex] or [tex]c = -\sqrt{39}[/tex]
Hope this helped you!
