Respuesta :

AnimalPost

Answer:

x = 3 or -3

Step-by-step explanation:

So you have the equation x² - 9 = 0

Move the 9 to the other side: x² = 9

Then take the square root of both sides: [tex]\sqrt{x^{2} }[/tex] = ±[tex]\sqrt{9}[/tex]

x = ±[tex]\sqrt{9}[/tex] = ±3

x = 3 or -3

NoNameWasGiven

Answer: x = 3, x= - 3

Step-by-step explanation:

x^2 - 9 = 0

=> x^2 = 9

=> x = 3, x= - 3