lanaiii lanaiii
  • 20-02-2019
  • Mathematics
contestada

Factor Completely: x2 - 81
A.(x-9)(x+9)
B.(x+9)(x+9)
C.(x-9)(x-9)
D.(9-x)(9+x)

Respuesta :

april861 april861
  • 20-02-2019

Answer is A

The binomial can be factored using the difference of squares formula a2-b2 = (a+b) (a-b) where a=x and b=9

(X+9) x(x-9)

Answer Link
safyra2005 safyra2005
  • 21-04-2020

Answer:

the answer is A

Step-by-step explanation:

i just did it on usa testprep

Answer Link

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