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Math Help - sets help please

  1. #1
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    Sep 2005
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    84

    sets help please

    Please find the question attached.

    I don't understand how to form the list.

    thanks

    Kind Regards
    Attached Thumbnails Attached Thumbnails sets help please-set-question.jpg  
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  2. #2
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    Smile

    X^3+3x^2-10x=0
    x(x^2+3x-10)=0

    x^2+3x-10=0
    D=9+40=49
    x1=2
    x2=-5

    x(x^2+3x-10)=x(x-2)(x+5)
    A={-5,0,2}
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  3. #3
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    ok yeh i understand.

    thanks
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