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View Thread: Math Quiz: 9 is number one
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    iStation

    when

    a = b

     

    multiply both sides by 8a

    8a^2 = 8ab

     

    add (a^2 - 9ab) to both sides

    8a^2 + (a^2 - 9ab) = 8ab + (a^2 - 9ab)

     

    simplify them to

    9(a^2 - ab) = (a^2 - ab)

     

    divide both sides by (a^2 - ab)

    9 = 1

     

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