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Math Help - quadratic equations

  1. #1
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    quadratic equations

    How do you factorise the following

    x2+2xy+y2-z2
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  2. #2
    Bar0n janvdl's Avatar
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    Quote Originally Posted by Niamh Dixon View Post
    How do you factorise the following

    x2+2xy+y2-z2
    (x + y)^2 - z^2

    = \left( (x + y) - z \right) \left( (x + y) + z \right)
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  3. #3
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    quadratic equations

    What happened to the 2xy?

    TKS
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  4. #4
    Bar0n janvdl's Avatar
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    Quote Originally Posted by Niamh Dixon View Post
    What happened to the 2xy?

    TKS
    x^2 + 2xy + y^2 = (x + y)^2

    Do you agree?

    MY 1th POST!!!
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  5. #5
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    quadratic equations

    Cheers thanks for your help
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  6. #6
    Super Member wingless's Avatar
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    Quote Originally Posted by janvdl View Post
    x^2 + 2xy + y^2 = (x + y)^2

    Do you agree?

    MY 1th POST!!!

    Haha, congratz ^^
    (like i'm old in the forum ;p)
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  7. #7
    Bar0n janvdl's Avatar
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    Quote Originally Posted by wingless View Post

    Haha, congratz ^^
    (like i'm old in the forum ;p)
    Thank you! I'm finally a contributor
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