Respuesta :

gmany

Answer:

y = -9 or y = 9

Step-by-step explanation:

[tex]y^2=81\iff y=\pm\sqrt{81}\\\\y=-9\ or\ y=9\ because\ (-9)^2=81\ and\ 9^2=81[/tex]

Answer:

9

Step-by-step explanation:

9*9=81

Otras preguntas