What are the solutions to the equation [tex]x^2 = 81[/tex]?

A. 40.5 only
B. 40.5 and –40.5
C. 9 and –9
D. 9 only

x 2 = 81 t h e n x = 9 an d x = − 9 b ec a u se : ( − 9 ) 2 = 81 an d 9 2 = 81
x 2 = 81 → x = − 81 ​ an d x = 81 ​ → x = − 9 an d x = 9

Answered by Anonymous | 2024-06-10

C. 9 and -9 ;

Answered by Ashtonnnnnn | 2024-06-12

The solutions to the equation x 2 = 81 are x = 9 and x = − 9 . Therefore, the correct answer is option C: 9 and –9 . This shows that when dealing with squared variables, both positive and negative roots must be acknowledged.
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Answered by Anonymous | 2024-12-23