Respuesta :

amna04352

Answer:

+/- 9i

Step-by-step explanation:

+/- sqrt(-81) = +/- sqrt(-1) × sqrt(81)

= +/- 9i

igoroleshko156

Step-by-step explanation:

Step 1:  Find the radical

[tex]\pm\sqrt{-81}[/tex]

[tex]\pm(\sqrt{-1} * \sqrt{81})[/tex]

[tex]\pm i*9[/tex]

[tex]\pm 9i[/tex]

Answer:  [tex]\pm 9i[/tex]