Respuesta :

wegnerkolmp2741o

Answer:

see below

Step-by-step explanation:

x^2 - 9^2

We know this is the difference of squares

a^2 - b^2 = (a-b) (a+b)

The second term is 9^2 not 3^2

(x-9) ( x+9)

amna04352

Answer:

Square root of 9² is 9, not 3

Step-by-step explanation:

x² - 9²

(x - 9)(x + 9)

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