andrewcell2017
andrewcell2017 andrewcell2017
  • 10-06-2021
  • Mathematics
contestada

help me i do not understand this

help me i do not understand this class=

Respuesta :

anitapantjoshi
anitapantjoshi anitapantjoshi
  • 10-06-2021

Answer:

that is 81 which is 9 ^2 and you can you use

Step-by-step explanation:

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

=(9^2-8^2)

=(9-8)(9+8)

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