Respuesta :

Answer:

A. x-9 and x+9 because these are perfect squares. 9 times -9 is -81. x times x is x^2. 9 + -9 is 0

faithwinford12
(x-9)(x+9)

x^2-81

Write the number in exponential form with an exponent of 2

x^2-9^2

Use a^2-b^2=(a-b)(a+b)
(x-9)(x+9)

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