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    Hey again, I've not yet learnt how to do this, can anyone shed some light on it for me? Thanks.

    a) Show that the elimination of x from the simultaneous equations:

    x-2=1
    3xy-y^2=8

    Produces the equation: 5y^2+3y-8=0

    I'm not sure where the 5 comes from.
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    typo?
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    theres a mistake in the question
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    (Original post by dichr0ic)
    typo?
    (Original post by didgeridoo12uk)
    theres a mistake in the question
    I thought as much, I've noticed a few typo's in this book.

    Thanks for the help.
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    (Original post by Srxjer)
    Hey again, I've not yet learnt how to do this, can anyone shed some light on it for me? Thanks.

    a) Show that the elimination of x from the simultaneous equations:

    x-2=1
    3xy-y^2=8

    Produces the equation: 5y^2+3y-8=0

    I'm not sure where the 5 comes from.
    I assume you mean

    x-2y=1
    3xy-y^2=8?

    First, rearrange the first equation to get x = \mathrm{[something]}.
    Then you can replace the x in the second equation with the \mathrm{[something]} you found.

    Multiply out the bracket and bring everything to the left hand side & you have the answer.
 
 
 
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