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what is -3 x -3 x -3 x -3?

My mom and I were having a debate and I think it's 81, but she thinks it
-81. Which one of us is right?

  • math -

    81. negative times a negative is a positive. -3 X -3= 9----->9 X 9 = 81

  • math -

    I knew it! Thanks

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