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Math Help - Systems- Check

  1. #1
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    Exclamation Systems- Check

    Solve by the method of your choice.

    x^2+y^2=50
    (x-7)^2+y^2=1

    I got; {(7,1), (7,-1),(-7,1),(-7,-1)}

    x^2+y^2=29
    -8x+y^2=41

    I got: {(-2,5),(-2.-5)}
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by soly_sol View Post
    Solve by the method of your choice.

    x^2+y^2=50
    (x-7)^2+y^2=1

    I got; {(7,1), (7,-1),(-7,1),(-7,-1)}
    you know, you could check your solutions by plugging into the original system. you would have immediately realize that (-7,-1) and (-7,1) do not work in the second equation, so those solutions are wrong

    your answer to the second is ok
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  3. #3
    MHF Contributor kalagota's Avatar
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    Taguig City, Philippines
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    Quote Originally Posted by soly_sol View Post
    Solve by the method of your choice.

    x^2+y^2=50
    (x-7)^2+y^2=1

    I got; {(7,1), (7,-1),(-7,1),(-7,-1)}
    what did you do?
    what is (-7 - 7)^2 + ( \pm 1)^2?

    Quote Originally Posted by soly_sol View Post
    x^2+y^2=29
    -8x+y^2=41

    I got: {(-2,5),(-2.-5)}
    right! but i think, there is more.. EDIT: no more..
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