Seudónimo Seudónimo

23-03-2020
Mathematics

contestada

x^2-81=0 solve the question

Respuesta :

laishacruz011 laishacruz011

23-03-2020

Answer:

9 and -9

Step-by-step explanation

add 81 to both sides

take square root of both sides

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Answer Link

Stryfer Stryfer

23-03-2020

Answer:

[tex]x=+9,-9[/tex]

Step-by-step explanation:

[tex]x^2-81=0\\x^2=81\\x=\sqrt{81}\\x=9,-9[/tex]

Answer Link

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