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9th grade

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(a-8)(a-9)

  • 9th grade -

    a^2-9a-8a+72 = a^2 -17a+72

  • 9th grade -

    (2x-1)(x+2)

  • 9th grade -

    FOIL

  • 9th grade -

    a^2-17a+72

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